<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>css教学(学生：Dream·Sky)</title>
<style type="text/css">
.search{background:url(img/searchbg.jpg);width:250px;height:37px;}
/*这里之所以用两个div是为了解决float:left的时候，margin-left在ie与ff下的不同解析*/
.s_1{float:left;width:12px;}
.s_3{float:left;width:2px;}
.s_2{float:left;width:185px;}
.s_4{float:left;width:25px;}
.txt{width:170px;border:0;margin-top:8px;color:#CCCCCC;}
.btn{margin-top:5px;}
</style>
<script type="text/javascript">
function f(){
alert(document.getElementById("Text1").value);
}
</script>
</head>
<body>
<div class="search">
<div class="s_1"> </div><!--这里需要加空格，否则火狐下无效-->
<div class="s_2">
<input id="Text1" type="text" class="txt" value='搜索我们的产品..' onclick="this.value='';" />
</div>
<div class="s_3"> </div>
<div class="s_4"><input type="image" src="img/btnbg.jpg" class="btn" onclick="f();" /></div>
</div>
</body>
</html>