动态提示的下拉框
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<META content="fason,阿信" name=Author>
<title>動態(tài)提示的下拉框</title>
<style>
a{color:red;text-decoration:none;font-size:12px}
</style>
</head>
<body οnlοad="Init()">
<center>
<h2>動態(tài)提示的下拉框</h2>
<hr>
<form name=frm>
<table>
? <tr>
??? <td>請輸入1或2或3或4或5進(jìn)行測試：<br><input name="txt" style="width:100px" οnkeyup="SelectTip(0)"> <input type="button" value="reset" οnclick="SelectTip(1)"></td>
? </tr>
? <tr>
??? <td>
??? <span id="demo"><select name="demo" style="width:100px" size=10 οnchange="txt.value=options[selectedIndex].text;">
??? <option value="a">1</option>
??? <option value="aa">12</option>
??? <option value="aaa">123</option>
??? <option value="aaaa">134</option>
??? <option value="2">2</option>
??? <option value="23">23</option>
??? <option value="234">234</option>
??? <option value="2345">2345</option>
??? <option value="3">3</option>
??? <option value="34">34</option>
??? <option value="345">345</option>
??? <option value="3456">3456</option>
??? <option value="5">5</option>
??? <option value="51">51</option>
??? <option value="51w">51w</option>
??? <option value="51wi">51wi</option>
??? <option value="51win">51win</option>
??? <option value="51windows">51windows</option>
??? </select></span>
??? </td>
? </tr>
?</form>
</table>
<hr>
<script language="javascript">
var TempArr=[];//存貯option
function Init(){
var SelectObj=document.frm.elements["demo"]
/*先將數(shù)據(jù)存入數(shù)組*/
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的內(nèi)容開頭的，添option。若flag為true,對下拉框初始化
??? Arr[Arr.length]="<option value='"+TempArr[i][1]+"'>"+TempArr[i][0]+"</option>"
??? innerHTML=SelectHTML+Arr.join()+"</SELECT>"
}
}
</script>
</body>
轉(zhuǎn)載于:https://www.cnblogs.com/hyladmin/archive/2007/11/02/946522.html
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