javascript實現導向功能表的具體方法

來源:互聯網
上載者:User

傳統

這裡要做的是,省略Go There按鈕,選擇功能表項目後,直接跳轉。

Html代碼

複製代碼 代碼如下:<!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>轉移菜單</title> 
<script type="text/javascript" src="轉移菜單.js"></script> 
</head> 
<body> 
<form> 
  <select id="newLocation"> 
    <option selected="selected" value="">Select a topic</option> 
    <option value="topic1.html">topic1</option> 
    <option value="topic2.html">topic2</option> 
    <option value="topic3.html">topic3</option> 
    <option value="topic4.html">topic4</option> 
    <option value="topic5.html">topic5</option> 
  </select> 
  <!--當瀏覽器不支援javascript或者禁用指令碼運行時被調用--> 
 <noscript> 
    <input type="submit" value="Go There!"/> 
 </noscript> 
</form> 
</body> 
</html> 

Javascript指令碼複製代碼 代碼如下:window.onload=initForm; 
//防止頁面緩衝,無法觸發onload  
window.onunload=function(){} 
    function initForm(){ 
        document.getElementById("newLocation").selectIndex=0; 
        document.getElementById("newLocation").onchange=jumpPage; 
        } 
    function jumpPage(){ 
        var newLoc=document.getElementById("newLocation"); 
        var newPage=newLoc.options[newLoc.selectedIndex].value; 
        if (newPage!=""){ 
            window.location=newPage; 
            } 
        } 

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