<head>
<title></title>
<script src ="Jq/jquery-1.4.2.js" type ="text/javascript" ></script>
<script type ="text/javascript">
$(function (){
$("p").click(function (){alert ("小P");})
});
</script>
</head>
<body>
<input type="button" value ="PlayGame" id="btnClick" />
<p>第一个</p>
<p>第二个</p>
</body>
<head>
<title></title>
<script src ="Jq/jquery-1.4.2.js" type ="text/javascript" ></script>
<script type ="text/javascript">
$(function (){
$(".warning").click(function (){alert("这是警告信息");});
});
</script>
<style type="text/css" >
.warning{background-color :Yellow ;color :Red ;}
</style>
</head>
<body>
<p>没有警告</p>
<div class ="warning " >请带好小孩</div>
<p class ="warning ">再次警告你</p>
<input class ="warning " type ="button" value ="别点啊" />
</body>
<head>
<title></title>
<script src ="Jq/jquery-1.4.2.js"></script>
<script type ="text/javascript" >
$(function (){
$(".docc,p,#txt1").click(function (){alert ("不要上当啊");})
})
</script>
<style type="text/css" >
.docc{background-color :Fuchsia ;color :Olive ;}
</style>
</head>
<body>
<p>电脑热卖</p>
<input type ="text" id="txt1" />
<input class ="docc" type ="button" value ="上当" />
<input type ="checkbox" />
</body>