shangrila-xiu

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js_实例

新开普各种js实例的讲解

1、array根据设定的时间来显示图片

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<body onload="show()">
<center>
<img src=images/p1.jpg width=800 height=600 id=photo>
</body>
<script language="javascript">
function show()
{
	var myphoto=document.getElementById("photo");
	var s=myphoto.src.split("images/"); //s[0]="images/"; s[1]="p1.jpg";
	var number=s[1].charAt(1);
	number++;
	if(number>5)
		number=1;
	myphoto.src="images/p"+number+".jpg";
	setTimeout("show()",1000);
}
</script>

2、array选择图片

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<meta charset=utf-8>
<select id=bg name=bg onchange="show(this)">
	<option value="">-请选择一张</option>
	<option value=1>图片1</option>
	<option value=2>图片2</option>
	<option value=3>图片3</option>
	<option value=4>图片4</option>
	<option value=5>图片5</option>
</select>
<hr><p align=center>
<div id=photo></div>
<script language="javascript">
function show(o)
{
	if(o.value!="")
	{
		document.getElementById("photo").innerHTML="<img src=images/p"+o.value+".jpg width=600>";
	}
	else
	{
		location.href="array3.html";
	}
}
</script>

3、display_侧边下拉菜单

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<meta charset=utf-8>
<style type="text/css">
li
{
	list-style:none;
}
</style>
[ <a href=# id=mylink onclick="showall()">全部展开</a> ]<hr>
<a href=# onclick="op(1)" id="a1">用户管理</a><p>
		<ul id=1>
			<li><a href=#>用户添加</a></li>
			<li><a href=#>用户管理</a></li>
		</ul>
<a href=# onclick="op(2)" id="a2">商品管理</a><p>
		<ul id=2 style="display:none">
			<li><a href=#>商品添加</a></li>
			<li><a href=#>商品管理</a></li>
		</ul>
<a href=# onclick="op(3)" id="a3">订单管理</a><p>
		<ul id=3 style="display:none">
			<li><a href=#>订单添加</a></li>
			<li><a href=#>订单管理</a></li>
		</ul>
<script language="javascript">
function op(id)
{
	var o=document.getElementById(id);
	for(i=1;i<=3;i++){
		if(i==id){
				if(o.style.display=="none")
					o.style.display="block";
				else
					o.style.display="none";
			}else{
		document.getElementById(i).style.display="none";
		}
	}
}
/*function op(a,id){
	var aa=document.getElementById(a);
	var idd=document.getElementById(id);
		aa.onmouseover=function(){
				idd.style.display="block";
			}
		aa.onmouseout=function(){
				idd.style.display="none";
			}
}
op("a1","1");op("a2","2");
op("a3","3");*/
function showall()
{
	var my=document.getElementById("mylink");
	if(my.innerHTML=="全部展开")
	{
		my.innerHTML="全部收回";
		for(i=1;i<=3;i++)
		{
			document.getElementById(i).style.display="block";
		}
	}
	else
	{
		my.innerHTML="全部展开";
		for(i=1;i<=3;i++)
		{
			document.getElementById(i).style.display="none";
		}
	}
}
</script>

4、进度

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<meta charset=utf-8>
<style type="text/css">
.my1
{
	border:2px solid #00FF00;
	width:200px;
	height:22px;
}
</style>
<body onload="mystart()">
<div class=my1><img src=images/border.png width=0 height=20 id=photo> <span id=current></span></div>
</body>
<script language="javascript">
function mystart()
{
	var o=document.getElementById("photo");
	o.width=o.width+1;
	document.getElementById("current").innerHTML=o.width+"%";
	if(o.width>200)
		o.stop();
	setTimeout("mystart()",10);
}
</script>

5、简单的计算器功能实现

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第一个数：<input type=text id=first><p>
第二个数：<input type=text id=second><p>
<input type=button value=+ onclick="op('+')">
<input type=button value=- onclick="op('-')">
<input type=button value=* onclick="op('*')">
<input type=button value=/ onclick="op('/')"><p>
结果：<input type=text id=result>
<script language="javascript">
function op(fuhao)
{
	var first=parseInt(document.getElementById("first").value);
	var second=parseInt(document.getElementById("second").value);
	switch(fuhao)
	{
		case '+':
			var value=first+second;
			document.getElementById("result").value=value;
			break;
		case '-':
			var value=first-second;
			document.getElementById("result").value=value;
			break;
		case '*':
			var value=first*second;
			document.getElementById("result").value=value;
			break;
		case '/':
			if(second!=0)
			{
				var value=first/second;
				document.getElementById("result").value=value;
			}
			else
			{
				alert("除数不能为0!");
				document.getElementById("second").value="";
				document.getElementById("second").focus();
			}
			break;
	}
}
</script>

6、mouseover和mouseout轮播图的使用

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<meta charset=utf-8>
<marquee onmouseover="this.stop()" onmouseout="this.start()"><img src="images/78.gif"></marquee>

7、onclick2-value的值加减操作

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<meta charset=utf-8>
<p>订购数量</p>
<input type="button" value="<" onclick="jian('<')"><input type="text" id="num" value=1><input type="button" value=">" onclick="add('>')">
<script>
	var o=document.getElementById('num');
	function jian(t){
		
		if(t=='<'){
		if(o.value>1){
			o.value--;
		}
		}
	}
	function add(t){
	if(t=='>'){
		o.value++;
	}
	}
</script>

8、协议同意按钮可用

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<meta charset="utf-8">
<input type=checkbox id="a" onclick="check(this)" value=""><p>我已同意此条协议。<p><br>
<input type="button" value="确定，下一步" disabled id="ok" >
<script>
	function check(o){
		if(o.checked==true){
			document.getElementById('ok').disabled=false;
		}
		else
			document.getElementById('ok').disabled=true;
	}
</script>

9、onfocus和onblur文本框背景变色

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<meta charset=utf-8>
<style type="text/css">
.a1 /*定义名为a1的类选择符*/
{
	background:#FFFF00;
	border:2px solid #FF0000;
}
.a2
{
	background:#FFFFFF;
	border:1px solid #CCCCCC;
}
</style>
用户名：<input type=text id=username onfocus="op1()" onblur="op2()">
<script language="javascript">
function op1()
{
	var o=document.getElementById("username");
	o.className="a1";
}
function op2()
{
	var o=document.getElementById("username");
	o.className="a2";
}
</script>

10、onmouseover_显示大图

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<meta charset=utf-8>
<body bgcolor="#ccc">
<table border=0 width=960 style="margin:0 auto;">
	<tr align=center>
		<td><img src="images/p1.jpg" width=200 height=200 onmouseover="show('p1')" onmouseout="out('p1')"></td>
		<td><img src="images/p2.jpg" width=200 height=200 onmouseover="show('p2')" onmouseout="out('p2')"></td>
		<td><img src="images/p3.jpg" width=200 height=200 onmouseover="show('p3')" onmouseout="out('p3')"></td>
		<td><img src="images/p4.jpg" width=200  height=200 onmouseover="show('p4')" onmouseout="out('p4')"></td>
		<td><img src="images/p5.jpg" width=200 height=200  onmouseover="show('p5')" onmouseout="out('p5')"></td>	
	</tr>
	<tr align="center">
		<td colspan=5><img src="images/space.jpg" width=750 id="photo"></td>
	</tr>
</table>
<script>
	function show(o){
		var p=document.getElementById('photo');
		p.src="images/"+o+".jpg";
	}
	function out(i){
		var p=document.getElementById('photo');
		p.src="images/space.jpg";
	}
</script>
</body>

11、onmouseover_改变背景颜色

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<meta charset=utf-8>
	<table border=1 width=20% align=center>
		<tr align=center bgcolor="#ccc" onmouseover="change(this)" onmouseout="unchange(this)">
			<th>姓名</th>
			<th>年龄</th>
			<th>成绩</th>
		</tr>
		<tr align=center onmouseover="mopen(this)" onmouseout="unchange(this)">
			<td>秀秀</td>
			<td>10</td>
			<td>100</td>
		</tr>
		<tr align=center onmouseover="mopen(this)" onmouseout="unchange(this)">
			<td>栗子</td>
			<td>17</td>
			<td>90</td>
		</tr>
		<tr align=center onmouseover="mopen(this)" onmouseout="unchange(this)">
			<td>方丽</td>
			<td>15</td>
			<td>89</td>
		</tr>
	</table>
	<script>
		function change(t){
			t.style.background="#FFF8DC";
			t.style.color="#BC8F8F";
			t.style.cursor="hand";
		}
		function unchange(k){
			k.style.background="#FFFfff";
			k.style.color="#333";
			
		}
		function mopen(i){
			i.style.background="#F5F5DC";
			i.style.color="#CD5C5C";
			i.style.cursor="hand";
		}
		
	</script>

12、prompt_阶乘

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<meta charset=utf-8>
<input type="button" value="点击计算输入的数字的阶乘" onclick="my()">
<script>
	function my(){
		var s=prompt("请输入一个数字");
		var n=1;
		for(i=1;i<=s;i++){
			n=n*i;
		}
		alert(s+"的阶乘是："+n);
	}
</script>

13、tab_menu_display菜单

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<meta charset=utf-8>
<style>
	a
	{
	width:150px;
	height:30px;
	line-height:30px;
		float:left;
		text-decoration:none;
		color:#ccc;
	}
	a:hover{
		color:#ff0000;
		
	}
	.a1{
		background:#fcfcfc;
		border-top:1px solid red;
		border-left:1px solid red;
		border-right:1px solid red;
	}
	.a2{
		border-bottom:1px solid red;
	}
	#bank,#zhifu{
		width:300px;
		height:150px;
		border-left:1px solid red;
		border-bottom:1px solid red;
		border-right:1px solid red;
	}
</style>
<table align=center cellspacing=0 cellpadding=0>
	<tr align=center>
		<td >
			<a href="#" class="a1"  id="bank1" onclick="op('bank')">银行卡支付</a>
			<a href="#" onclick="op('bank')" id="bank2" style="display:none;" class=a2>银行卡支付</a>
		</td>
		<td >
			<a href="#" class="a1" id="zhifu1" onclick="op('zhifu')" style="display:none;">支付宝支付</a>
			<a href="#" onclick="op('zhifu')" id="zhifu2" class=a2>支付宝支付</a>
		</td>
	</tr>
	<tr>
		<td colspan=2>
			<div id="bank">
				<table width=100% align=center>
					<tr>
						<td>银行选择</td>
						<td><select>
							<option>中国工商银行</option>
							<option>中国农业银行</option>
							<option>中国建设银行</option>
							<option>中国银行</option>
						</select></td>
					</tr>
					<tr>
						<td>账号</td>
						<td><input type="text"></td>
					</tr>
					<tr>
						<td>密码</td>
						<td><input type="password"></td>
					</tr>
					<tr colspan=2>
						<td><input type="submit" value="确定"></td><td><input type="reset" value="取消"></td>
					</tr>
				</table>
			
			</div>
			<div id="zhifu" style="display:none;">
				<table width=100% align=center>
					<tr>
						<td>支付宝账号</td>
						<td><input type="text"></td>
					</tr>
					<tr>
						<td>密码</td>
						<td><input type="password"></td>
					</tr>
					<tr colspan=2>
						<td><input type="submit" value="确定"></td><td><input type="reset" value="取消"></td>
					</tr>
				</table>
			
			</div>
		</td>
	</tr>
</table>
<script>
	function op(t){
		if(t=="bank") //证明点的是银行卡支付
	{
		document.getElementById("bank1").style.display="block";
		document.getElementById("bank2").style.display="none";
		document.getElementById("zhifu1").style.display="none";
		document.getElementById("zhifu2").style.display="block";
		document.getElementById("bank").style.display="block";
		document.getElementById("zhifu").style.display="none";
	}
	else if(t=="zhifu")
	{
		document.getElementById("bank1").style.display="none";
		document.getElementById("bank2").style.display="block";
		document.getElementById("zhifu1").style.display="block";
		document.getElementById("zhifu2").style.display="none";
		document.getElementById("bank").style.display="none";
		document.getElementById("zhifu").style.display="block";
	}
	}
</script>

14、tabmenu下拉菜单

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<meta charset=utf-8>
<style>
a{
display:block;
	text-decoration:none;
	color:#fff;
	background:#0663a8;
	margin-left:2px;
	width:150px;
	height:40px;
	/*float:left;*/
	text-align:center;
	line-height:40px;
}
a:hover{
width:150px;
height:40px;
	color:#fff;
	background:#ff0000;
}
</style>
<table align=center cellpadding=0 cellspacing=0>
	<tr>
		<td><a href="#" onmouseover="ov(1)" onmouseout="clos(1)">文件</a></td>
		<td><a href="#" onmouseover="ov(2)" onmouseout="clos(2)">编辑</a></td>
		<td><a href="#" onmouseover="ov(3)" onmouseout="clos(3)">查看</a></td>
	</tr>
	<tr>
		<td ><div style="display:none;" id=1>
		<a href="#" onmouseover="ov(1)" onmouseout="clos(1)">打开。。</a>
		<a href="#" onmouseover="ov(1)" onmouseout="clos(1)">保存</a>
		<a href="#" onmouseover="ov(1)" onmouseout="clos(1)">另存为</a></div></td>
	
		<td><div style="display:none;" id=2>
		<a href="#" onmouseover="ov(2)" onmouseout="clos(2)">复制</a>
		<a href="#" onmouseover="ov(2)" onmouseout="clos(2)">粘贴</a>
		<a href="#" onmouseover="ov(2)" onmouseout="clos(2)">剪切</a></div></td>
<td  >
<div style="display:none;" id="3">
		<a href="#" onmouseover="ov(3)" onmouseout="clos(3)">字体</a>
		<a href="#" onmouseover="ov(3)" onmouseout="clos(3)">颜色</a>
		<a href="#" onmouseover="ov(3)" onmouseout="clos(3)">换行符</a>
		</div>
		</td>
	</tr>
</table>
<script>
	function ov(id){
		document.getElementById(id).style.display="block";
	}
	function clos(id){
		
		document.getElementById(id).style.display="none";
	}
</script>

15、tab_显示内容

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<meta charset=utf-8>
<style>
.contain{
width:504px;
height:auto;
	margin:0 auto;
	border:1px solid #ccc;
}
a{
	text-decoration:none;
}
ul{
	list-style:none;
}
.a1{
	float:left;
	width:100px;
	height:30px;
	line-height:30px;
	text-align:center;
   border-top:4px solid blue;
	border-left:1px solid #ccc;
	border-right:1px solid #ccc;
}
.aa1{
	width:100px;
	height:30px;
	float:left;
	line-height:30px;
	text-align:center;
border-bottom:4px solid blue;
border-top:1px solid #ccc;
border-right:1px solid #ccc;
}
.a2{
border-bottom:4px solid blue;
border-top:1px solid #ccc;
border-right:1px solid #ccc;
	width:200px;
	height:30px;
	font-size:3px;
}
.a2 a{
position:relative;
right:-80px;
margin:3px;
}
/*内容*/
.con_1{
	width:504px;
	/*border:1px solid black;*/
}
.con_2{
	width:484px;
	/*border:1px solid black;*/
	margin-left:18px;
}
.t2{
	margin-top:10px;
	
}
#carr  img,#twoo  img,#jiangg img{
	width:100px;
	height:89px;
}
.im{
margin-left:-7px;
	float:left;
	width:100px;
	height:auto;
}
.c1{
	color:rgb(18,1,159);
	font-weight:bold;
   
}
.content1{
float:left;
}
.content ul li{
	padding-left:10px;
}
.t3{
	margin-left:20px;
}
.t4{
	    margin-left: 106px;
	height:100px;
	margin:0 auto;
	
}
.con{
margin-top:7px;
margin-left:-9px;
}
</style>
<div class="contain">
<table align=center border=0 cellpadding=0 cellspacing=0>
	<tr>
		
			<td >
				<a href="#" id="car1" onclick="op('car')" class="a1"><img src="images/img1.jpg">汽车</a>
				<a href="#" id="car2" onclick="op('car')" style="display:none;" class="aa1"><img src="images/img1.jpg">汽车</a></td>
				<td ><a href="#"  id="jiang1" onclick="op('jiang')" class="a1" style="display:none;">降价</a>
				<a href="#" id="jiang2" onclick="op('jiang')" class="aa1">降价</a></td>
				<td ><a href="#" id="two1" onclick="op('two')"  class="a1"  style="display:none;">二手车</a>
				<a href="#" id="two2"  onclick="op('two')" class="aa1">二手车</a></td>
				
				<td class="a2"  colspan=3>
					<a href="#" >查违章|</a><span style="float:left;margin-left:-20px;"></span>
					<a href="#">优惠|</a><span style="float:left;margin-left:-22px;"></span>
					<a href="#">论坛</a>
				</td>
		
	</tr>
</table><!--导航结束-->
<!--汽车开始-->
	<div class="con_1">
		<div class="con_2">
			<table cellspacing=0 cellpadding=0  align=center class="t2"> 
				<tr><td >
				<div class=cc>
					<div id="carr">
						<div class="im">
						<img src="images/img2.jpg" >
						<p style="margin-top:2px;font-size:4px;background:#ccc;"><a href="#">全新思域颜值逆天</a></p>
						</div>
						<div class="content1">
							<table border=0 height=90 cellspacing=0 cellpadding=0 class="t3">
							<tr height=35>
								<td colspan=2><a href="#" class="c1">丰田RAV4/本田CR-V 紧凑SUV谁更好</a></td>
							</tr>
								<tr height=35>
							<td ><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							</table>
						
							</div>
							<div class="con">
							<table border=0 height=90 cellspacing=0 cellpadding=0 class="t4" width=480>
									<tr height=35 >
							<td ><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td ><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							</table>
							<div class="foo"><a href="#" style="color:rgb(100,255,255);">广告|</a>
								<span style="font-size:17px;">北现勇夺今后服务大奖&nbsp;XEV260深度试驾体验</span>
							</div>
							</div>
						</div>
					</div><!--汽车结束-->
<!--降价开始-->
	
			
					<div id="jiangg" style="display:none;">
						<div class="im">
						<img src="images/img3.jpg" >
						<p style="margin-top:2px;font-size:4px;background:#ccc;"><a href="#">全新思域颜值逆天</a></p>
						</div>
						<div class="content1">
							<table border=0 height=90 cellspacing=0 cellpadding=0 class="t3">
							<tr height=35>
								<td colspan=2><a href="#" class="c1">丰田RAV4/本田CR-V 紧凑SUV谁更好</a></td>
							</tr>
								<tr height=35>
							<td ><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							</table>
						
							</div>
							<div class="con">
							<table border=0 height=90 cellspacing=0 cellpadding=0 class="t4" width=480>
									<tr height=35 >
							<td ><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td ><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							</table>
							</div>
							<div class="foo"><a href="#" style="color:rgb(100,255,255);">广告|</a>
								<span style="font-size:17px;">北现勇夺今后服务大奖&nbsp;XEV260深度试驾体验</span>
							</div>
						</div>
					</div><!--降价结束-->
					<!--二手开始-->
					<div id="twoo" style="display:none;">
						<div class="im">
						<img src="images/img4.jpg" >
						<p style="margin-top:2px;font-size:4px;background:#ccc;"><a href="#">全新思域颜值逆天</a></p>
						</div>
						<div class="content1">
							<table border=0 height=90 cellspacing=0 cellpadding=0 class="t3">
							<tr height=35>
								<td colspan=2><a href="#" class="c1">丰田RAV4/本田CR-V 紧凑SUV谁更好</a></td>
							</tr>
								<tr height=35>
							<td ><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							</table>
						
							</div>
							<div class="con">
							<table border=0 height=90 cellspacing=0 cellpadding=0 class="t4" width=480>
									<tr height=35 >
							<td ><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td ><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							<tr height=35>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							<td><a href="#" >全新标致308买哪款好</a></td>
							</tr>
							</table>
						</div>
						<div class="foo"><a href="#" style="color:rgb(100,255,255);">广告|</a>
								<span style="font-size:17px;">北现勇夺今后服务大奖&nbsp;XEV260深度试驾体验</span>
							</div>
					<!--二手车结束-->
					
				</td></tr>
			</table>
			</div>
			</div>
		</div>
<script>
	function op(t){
		if(t=='car'){
			document.getElementById('car2').style.display="none";
			document.getElementById('car1').style.display="block";
			document.getElementById('jiang2').style.display="block";
			document.getElementById('two2').style.display="block";
			document.getElementById('two1').style.display="none";
			document.getElementById('jiang1').style.display="none";
			document.getElementById('carr').style.display="block";
			document.getElementById('twoo').style.display="none";
			document.getElementById('jiangg').style.display="none";
		}else if(t=='jiang'){
			document.getElementById('car1').style.display="none";
			document.getElementById('car2').style.display="block";
			document.getElementById('jiang1').style.display="block";
			document.getElementById('two2').style.display="block";
			document.getElementById('two1').style.display="none";
			document.getElementById('jiang2').style.display="none";
			document.getElementById('carr').style.display="none";
			document.getElementById('twoo').style.display="none";
			document.getElementById('jiangg').style.display="block";
		}else if(t=='two'){
			document.getElementById('car1').style.display="none";
			document.getElementById('car2').style.display="block";
			document.getElementById('jiang2').style.display="block";
			document.getElementById('two1').style.display="block";
			document.getElementById('two2').style.display="none";
			document.getElementById('jiang1').style.display="none";
			document.getElementById('carr').style.display="none";
			document.getElementById('twoo').style.display="block";
			document.getElementById('jiangg').style.display="none";
		}
	}
</script>

16、text_onbluronfocus改变文本框的字

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> New Document </TITLE>
  <META NAME="Generator" CONTENT="EditPlus">
  <META NAME="Author" CONTENT="">
  <META NAME="Keywords" CONTENT="">
  <META NAME="Description" CONTENT="">
 </HEAD>
 <BODY>
  <input type="text" id="myname" value="输入关键字" onblur="had()" onfocus="cut()">
  <script type="text/javascript">
			function had(){
				if(document.getElementById("myname").value==""){
					document.getElementById("myname").value="输入关键字";}
				}	
			function cut(){
					document.getElementById("myname").value="";
			}
  </script>
 </BODY>
</HTML>

17、双色球的数字随机产生

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<meta charset=utf-8>
<script language="javascript">
//Math.random()	0-1之间的一个随机数
for(j=1;j<=10;j++)
{
	document.write("红球：");
	for(i=1;i<=6;i++)
	{
		var num=Math.floor(Math.random()*33+1);
		document.write(num+"\t");
	}
	num=Math.floor(Math.random()*16+1);
	document.write("蓝球："+num+"<br>");
}
</script>

18投票

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<html>
	<head><meta charset=utf-8><title>投票</title>
		<style type="text/css">
table
{
	font-size:13px;
	line-height:25px;
}
.t1
{
	width:22px;
	height:20px;
	border:0px;
	text-align:center;
}
</style>
	</head>
	<body>
		<table border=0 cellspacing=0 cellpadding=0>
		<tr>
				<td><input type=text value=0 width=20 height=20 id="beishang_text" width=20 class=t1></td>
				<td><input type=text value=0 width=20 height=20 id="chaozuo_text" width=20 class=t1></td>
				<td><input type=text value=0 width=20 height=20 id="fennu_text" width=20 class=t1></td>
				<td><input type=text value=0 width=20 height=20 id="gandong_text" width=20 class=t1></td>
				<td><input type=text value=0 width=20 height=20 id="gaoxing_text" width=20 class=t1></td>
				<td><input type=text value=0 width=20 height=20 id="wuliao_text" width=20 class=t1></td>
				<td> <input type=text value=0 width=20 height=20 id="yangyan_text" width=20 class=t1></td>
			</tr>
			<tr valign=bottom>
				<td><img src="images/xq.gif" id="beishang_img" width=20></td>
				<td><img src="images/xq.gif" id="chaozuo_img" width=20></td>
				<td><img src="images/xq.gif" id="fennu_img" width=20></td>
				<td><img src="images/xq.gif" id="gandong_img" width=20></td>
				<td><img src="images/xq.gif" id="gaoxing_img" width=20></td>
				<td><img src="images/xq.gif" id="wuliao_img" width=20></td>
				<td><img src="images/xq.gif" id="yangyan_img" width=20></td>
			</tr>
			
			<tr>
				<td><img src="images/beishang.gif"  width=20 onclick="my('beishang')"></td>
				<td><img src="images/chaozuo.gif" width=20 onclick="my('chaozuo')"></td>
				<td><img src="images/fennu.gif"  width=20 onclick="my('fennu')"></td>
				<td><img src="images/gandong.gif" width=20 onclick="my('gandong')"></td>
				<td><img src="images/gaoxiao.gif" width=20 onclick="my('gaoxiao')"></td>
				<td><img src="images/wuliao.gif"  width=20 onclick="my('wuliao')"></td>
				<td><img src="images/yangyan.gif"  width=20 onclick="my('yangyan')"></td>
			</tr>
		</table>
		<script>
			function my(o){
				var beishang=document.getElementById('beishang_img');
				var beishang_text=document.getElementById('beishang_text').value;
				if(o=='beishang'){
					
					beishang_text++;
					beishang.height=beishang_text;
					document.getElementById('beishang_text').value=beishang_text;
				}
				var chaozuo=document.getElementById('chaozuo_img');
				var chaozuo_text=document.getElementById('chaozuo_text').value;
				if(o=='chaozuo'){
					
					chaozuo_text++;
					chaozuo.height=chaozuo_text;
					document.getElementById('chaozuo_text').value=chaozuo_text;
				}
			}
		</script>
	</body>
</html>

19、用户名文本框背景变色_className

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<meta charset=utf-8>
<style type="text/css">
.a1 /*定义名为a1的类选择符*/
{
	background:#FFFF00;
	border:2px solid #FF0000;
}
.a2
{
	background:#FFFFFF;
	border:1px solid #CCCCCC;
}
</style>
用户名：<input type=text id=username onfocus="this.className='a1'" onblur="this.className='a2'">

20、运算符

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> New Document </TITLE>
  <META NAME="Generator" CONTENT="EditPlus">
  <META NAME="Author" CONTENT="">
  <meta charset=utf-8>
  <meta http-equiv="refresh" content="">
  <META NAME="Keywords" CONTENT="">
  <META NAME="Description" CONTENT="">
 </HEAD>
 <BODY>
	算术运算符：+，-，*，/,++，--，%<br>
	<script>
		document.write("10+3="+(10+3)+"<br>");
		document.write((10*3)+"<br>");
		document.write("10/3="+(10/3)+"<br>");
		document.write("10%3="+(10%3)+"<br>");
		document.write("10%-3="+(10%-3)+"<br>");
		document.write("-10%3="+(-10%3)+"<br>");
		document.write("-10%-3="+(-10%-3)+"<br>");
		var a=10;
		document.write("b=++a="+(++a)+"<br>");
		document.write("d=a++="+(a++)+"<br>");
		document.write("f=--a="+(--a)+"<br>");
		document.write("n=a--="+(a--)+"<br>");
	</script>
	<hr>
	逻辑运算符：逻辑与(&&)、逻辑或(||)、逻辑非(!)
	<hr>
	关系运算符：（大于）>,（大于等于）>=,（小于）<,（小于等于）<=,（等于）==,（不等）!=<br>
	<font>
	关系运算符的值有：true、false</font><br>
	<script>
	a=10,b=7,c=9;
		document.write("(a>b)&&(b>c)为"+((a>b)&&(b>c))+"<br>");
		document.write("(a>b)||(b>c)为"+((a>b)||(b>c))+"<br>");
		document.write("(a>b)&&(b<c)为"+(a>b)&&(b<c)+"<br>");
		document.write("(a>b)||(b>=c)为"+(a>b)||(b>=c)+"<br>");
	</script>
	<hr>
	位运算符：
	<code>&</code><br>
	<script>
	document.write("(5&3)为"+(5&3)+"<br>")
	</script>
	<hr>
	左移：<font> << </font><br>
	<script>
		document.write("(5<<3)为"+(5<<3)+"<br>");
	</script>
	<hr>
	右移：<font> >> </font><br>
	<script>
		document.write("(5>>3)为"+(5>>3)+"<br>");
	</script>
 </BODY>
</HTML>