关于鼠标点击其他地方隐藏层的实例（要引入jquery包哦）

<!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=utf-8" />
<title>test</title>
<style type="text/css">
.div_d{ padding:10px; border:1px dotted red; position:absolute; display:none; cursor:pointer;}
</style>
<script src="jquery-1.2.6.min.js"></script>
<script type="text/javascript">
$(function(){
           $("input[id=search]").focus(function(even){
                                    var pos=$(this).offset();

                                    $(".div_d").css({left:pos.left,top:pos.top+20+"px",display:"block"});
                                    });
            document.onclick=function(e){

                   var e=e?e:window.event;
                   var tar = e.srcElement||e.target;
                   if(tar.id!="search"){
                       if($(tar).attr("class")=="div_d"){
                           $(".div_d").css("display","block")
                       }else{
                           $(".div_d").css("display","none");
                       }
                   }
                }
           })

</script>
</head>

<body style=" padding-left:300px;">
<input id="search" />
<div class="div_d"> <a href="http://www.baidu.com" target="_blank">ldksjfla</a>;sdflaks;djf;lkasdjfl;kja;lsdk</div>
</body>
</html>