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js solves the problem of not being able to select in the select drop-down_javascript skills

WBOY
WBOYOriginal
2016-05-16 16:34:081591browse

When the select drop-down box appears in the mouseover event, the select drop-down box cannot be selected. Solution:

var o = e.relatedTarget || e.toElement;//The object moved to under judgment is null when moved to the option, ie, it is null, firefox, etc. is undefined. .
if (!o) return; //Exit for option without hiding

The complete code example is: 

<!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>无标题文档</title>
<style type="text/css">
*{margin:0;padding:0;list-style:none;border:0;}
.pop_blue{ position:absolute; cursor:pointer; padding:10px;}
.pop_blue span{ display:inline-block; width:24px; height:32px; background: url(../images/pop_blue.png) no-repeat;}

.map_xf .rud1{width:210px; position:absolute;border:1px solid #ddd; display:none; background-color:#fff;padding:17px 25px;}
.map_xf .rud1 li{margin:0 0 8px;}
.map_xf .rud1 input,.map_xf .rud1 select{height:22px;}
</style>
<script type="text/javascript" src="jquery-1.9.1.min.js"></script>
<script type="text/javascript">
$(function(){
$('.pop_blue').hover(
function(){
$(this).find('.rud1').show();
$(this).css("z-index","9999");
},
function(e){
var o = e.relatedTarget || e.toElement;//判断下移动到的对象，移动到option上ie下是null，firefox等为undefined。。
if (!o) return;//为option退出不隐藏

$(this).find('.rud1').hide();
$(this).css("z-index","0");
}
)
})
</script>
</head>

<body>
<div style="position:relative;width:100px;height:100px">
<div class="pop_blue" style="top:0px; left:0;"> <span>鼠标移上</span><i></i>
<div class="rud1 font12" style="top:10px;left:40px; display:none;padding:50px;background:blue;">
<ul>
<li>
<select class="w100" id="dan">
<option value="选择单元" selected="">选择单元</option>
<option value="选择单元" selected="">选择单元1</option>
<option value="选择单元" selected="">选择单元2</option>
<option value="选择单元" selected="">选择单元3</option>
<option value="选择单元" selected="">选择单元4</option>
</select>
</li>
</ul>
</div>
</div>
</div>
</body>
</html>


When the mouse is moved up, the selection will no longer appear.

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