类似于新浪微博搜索框弹出的效果
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>仿新浪微博搜索框弹出的效果</title>
<style type="text/css">
body{font-size:12px;}
.weibo{width:500px; height:200px; position:relative;}
.so{width:200px; height:24px; margin:30px;}
.so #s_so{width:100px; border:1px solid #ccc; line-height:20px; height:20px;}
#show{display:none; position:absolute; top:0px; left:10px; width:200px; height:60px; background:#fff; font-size:12px; border:1px solid #ccc; padding:10px;}
#show span{margin-left:120px; color:#F00; cursor:pointer;}
</style>
</head>
<body>
<script type="text/javascript">
var $=function (id){
return document.getElementById(id);
}
function s_show(){
$('s_so').value="";
$("show").style.display='block';
$("b_so").focus();
}
function closed(){
$("show").style.display='none';
$('s_so').value="搜索他说的话";
}
</script>
<div class="weibo">
<div class="so">
<form>
<input type="text" value="搜索他说的话" onfocus="s_show()" id="s_so"/><input type="submit" value="查找" />
</form>
</div>
<div id="show">
<p>搜索他说的话<span onclick="closed()">X</span></p>
<form>
<input type="text" value="" id="b_so"/><input type="submit" value="查找" />
</form>
</div>
</div>
</body>
</html>
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