JS中中Select下拉列表类下拉列表类(支持输入模糊查询支持输入模糊查询)功能功能
主要介绍了JS中Select下拉列表类(支持输入模糊查询)功能，代码简单易懂，非常不错，具有参考借鉴价值，需要的朋友参考下吧
下面给大家分享一段代码关于select下拉列表类支持输入模糊查询功能的实现代码，具体代码如下所示：
<span style="font-size:14px;"> <HTML>
<HEAD>
<META http-equiv='Content-Type' content='text/html; charset=gb2312'>
<TITLE>可输入的下拉框</TITLE>
</HEAD>
<BODY >
<Script Language="Javascript">
var j = 0;
function SelectValue(obj)
{
var input = obj.parentNode.nextSibling;
document.all.box2.value = obj.options[obj.selectedIndex].text;
document.getElementById("txtSection").value=obj.options[obj.selectedIndex].value;
alert(document.getElementById("txtSection").value);
}
function InputValue(obj)
{
var n = 1;
var tmpObj;
var src = document.all.SelectOption;
var msg = document.all.msg;
if(event.keyCode != 40 && event.keyCode != 38 && event.keyCode != 13){
if(obj.value!=""){
msg.style.display="";
msg.innerHTML="";
if(msg.hasChildNodes())
{
msg.childNodes[0].parentNode.removeChild(msg.childNodes[0]);
}
for (var i=0;i<src.length;i++){
var selValue = document.createElement("div");
var selText = document.createElement("div");
selText.value = src(i).value;
selText.innerHTML = src(i).text;
if (src(i).text.toLowerCase().indexOf(obj.value.toLowerCase())==0){
selText.setAttribute("id","selText"+n);
selText.onmouseover=function (){
this.style.backgroundColor='#003399';
this.style.color ='#ffffff';
}
selText.onmouseout=function (){
this.style.backgroundColor='#ffffff';
this.style.color ='#000000';
}
selText.onclick=function (){
document.all.box2.value = this.innerHTML;
msg.style.display="none";
document.getElementById("txtSection").value=this.value;
}
msg.appendChild(selText);
n++;
}
}
}
else {
document.all.msg.style.display="none";
}
}
else {
//press down key
if(event.keyCode==40){
j++;
for (var i=0; i<src.length; i++)
{
tmpObj = document.getElementById("selText"+i);
if(tmpObj != null){
tmpObj.style.backgroundColor='#ffffff';
tmpObj.style.color ='#000000';
}
}
tmpObj = document.getElementById("selText"+j);
if(tmpObj != null){
tmpObj.style.backgroundColor='#003399';
tmpObj.style.color ='#ffffff';
}else{
j = 0;
}
}
//press up key
if (event.keyCode==38){
j--;
for (var i=0; i<src.length; i++)
{
tmpObj = document.getElementById("selText"+i);
if(tmpObj != null){
tmpObj.style.backgroundColor='#ffffff';
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