select框的onchange（）事件 隐藏与显示另一个Select框 

<!DOCTYPE html>
<html>
    <head>
        
        <style>
        .addcss{
            width: 100px;
            height: 50px;
        }
        </style>
        
        
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
    
    <select class="addcss"   id="aaa" onchange="show()">
        <option value="0">0</option>
        <option value="1">1</option>
        <option value="2">2</option>
    </select>

  此处style="display:none"为隐藏，block为显示
<select class="addcss" style="display:none" id="_select">
    <option value="a">a</option>
    <option value="b">b</option>
</select>
    </body>
</html>


<script type="text/javascript">
function show(){
    var ss=document.getElementById("aaa").value;
    
    if (ss=="1") {
         document.getElementById('_select').style.display='block';
    } else{
         document.getElementById('_select').style.display='none';
    }
    
}
</script>

 

posted @ 2018-10-31 11:12  Jacky森  阅读(4384)  评论(0)    收藏  举报