<script type="text/javascript"> var a=["11","34","2","22","56"]; function finds(){ var see=document.getElementById("se"); var tee=document.getElementById("te"); see.length=0; var value1=tee.value; for(var i=0;i<a.length;i++){ if(a[i].indexOf(value1)==0){ var o=new Option(a[i],a[i]); see[see.length]=o; } }
var a=["2","22","2222","222222","222222","2222"]; function finds(){ var see=document.getElementById("se"); var tee=document.getElementById("te"); see.length=0; var value1=tee.value; for(var i=0;i<a.length;i++){ if(a[i].indexOf(value1)==0){ var o=new Option(a[i],a[i]); see[see.length]=o; } } see.size=see.length; } 通过设置下拉框的size属性
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Test</title>
</head>
<body>
<input type="text" value="" id="txtTest" onkeyup="Test();">
<select id="selectTest">
<option value="0">选择项</option>
<option value="1">abc</option>
<option value="2">def</option>
</select>
<script type="text/javascript">
function Test(){
var obj=document.getElementById("txtTest").getAttribute("value");
var select=document.getElementById("selectTest");
var temp=0;
for(var i=0;i<select.options.length;i++){
if(select.options[i].innerText==obj){
temp=i;
break;
}
}
select.options[temp].selected=true;
}
</script>
</body>
</html>
var a=["11","34","2","22","56"];
function finds(){
var see=document.getElementById("se");
var tee=document.getElementById("te");
see.length=0;
var value1=tee.value;
for(var i=0;i<a.length;i++){
if(a[i].indexOf(value1)==0){
var o=new Option(a[i],a[i]);
see[see.length]=o;
}
}
}
</script>
</head><body>
<input type="text" onkeyup="finds()" id="te"><br/>
<select id="se" size="2"></select>
</body>
大体做了下 你改改 感觉思路差不多吧
function finds(){
var see=document.getElementById("se");
var tee=document.getElementById("te");
see.length=0;
var value1=tee.value;
for(var i=0;i<a.length;i++){
if(a[i].indexOf(value1)==0){
var o=new Option(a[i],a[i]);
see[see.length]=o;
}
}
see.size=see.length;
}
通过设置下拉框的size属性