[查看演示] 源码如下
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<META content="fason,阿信" name=Author>
<META content="提示,下拉框" name=Keywords>
<title>动态提示的下拉框－www.51windows.Net</title>
<style>
a{color:red;text-decoration:none;font-size:12px}
</style>
</head>
<body onload="Init()" bgcolor="#3366cc">
<center>
<h2>动态提示的下拉框</h2>
<hr>
<form name=frm>
<table>
<tr>
<td><input name="txt" style="width:100px" onkeyup="SelectTip(0)"> <input type="button" value="reset" onclick="SelectTip(1)"></td>
</tr>
<tr>
<td>
<span id="demo"><select name="demo" style="width:100px" size=10 onchange="txt.value=options[selectedIndex].text;"></select></span>
</td>
</tr>
</form>
</table>
<hr>
<script language="javascript">
/*测试用*/
for(i=0;i<100;i++)
document.frm.demo.options[document.frm.demo.length]=new Option(String(Math.random()).substr(2,8))
var TempArr=[];//存贮option
function Init(){
var SelectObj=document.frm.elements["demo"]
/*先将数据存入数组*/
with(SelectObj)
for(i=0;i<length;i++)TempArr[i]=[options[i].text,options[i].value]
}
function SelectTip(flag){
var TxtObj=document.frm.elements["txt"]
var SelectObj=document.getElementById("demo")
var Arr=[]
with(SelectObj){
var SelectHTML=innerHTML.match(/<[^>]*>/)[0]
for(i=0;i<TempArr.length;i++)
if(TempArr[i][0].indexOf(TxtObj.value)==0||flag)//若找到以txt的内容开头的，添option。若flag为true,对下拉框初始化
Arr[Arr.length]="<option value='"+TempArr[i][1]+"'>"+TempArr[i][0]+"</option>"
innerHTML=SelectHTML+Arr.join()+"</SELECT>"
}
}
</script>
</body>
</html>
<div style="position: absolute; top: 10; right: 10; width: 148; height: 18;cursor:hand">
<input type="button" name="Button" value="查看源代码" onClick= 'window.location = "view-source:" + window.location.href'></div> |
