var xmlHttp

function showUser(str)
{ 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }
var url="http://localhost/home/getuser"
url=url+"?q="+str
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 {
 document.getElementById("txtHint").innerHTML=xmlHttp.responseText
 } 
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 //Internet Explorer
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}

//<![CDATA[
//弹出层 by ChenLiang v1.0
function LightBox(boxWidth,boxHeight,boxContent)
{
this.boxWidth=boxWidth;
this.boxHeight=boxHeight;
this.boxContent=boxContent;
var bgLayer,boxLayer;
var documentHtml=document.documentElement;
this.createBgLayer=function()
{
bgLayer = document.createElement("div");
with (bgLayer)
{
className="bgLayer";
style.width=documentHtml.scrollWidth+"px";
style.height=documentHtml.scrollHeight+"px";
style.display="none";
}
document.body.insertBefore(bgLayer,document.body.firstChild);
};
this.createBox=function(){
boxLayer = document.createElement("div");
with (boxLayer)
{
className = "boxLayer";
style.width=this.boxWidth + "px";
style.height = this.boxHeight +"px";
style.display="none";
};
document.body.insertBefore(boxLayer,document.body.firstChild);
};
this.init= function()
{
this.createBgLayer();
this.createBox();
}

this.show = function()
{
//hideShowSelect(true);
boxLayer.innerHTML=this.boxContent;
bgLayer.style.display = "block";
boxLayer.style.display = "block";
boxLayer.style.left = documentHtml.offsetWidth /2 - boxLayer.offsetWidth/2 +"px";
boxLayer.style.top = documentHtml.scrollTop + documentHtml.offsetHeight/2 - this.boxHeight/2 -30 + "px";
}
this.hide = function()
{
//hideShowSelect(false);
bgLayer.style.display = "none";
boxLayer.style.display = "none";
}
}