var xmlHttp;function checkit(str)
{window.document.reginfo.checkbutton.disabled=false;xmlHttp=GetXmlHttpObject();if(xmlHttp==null)
{alert("Browser does not support HTTP Request");window.document.reginfo.checkbutton.disabled=true;return;}
var url="getusername.asp";url=url+"?q="+str;url=url+"&sid="+Math.random();xmlHttp.onreadystatechange=stateChanged;xmlHttp.open("GET",url,true)
xmlHttp.send(null)
window.document.reginfo.checkbutton.disabled=true;}
function stateChanged()
{if(xmlHttp.readyState==4||xmlHttp.readyState=="complete")
{document.getElementById("txtHint").innerHTML=xmlHttp.responseText;}}
function GetXmlHttpObject()
{var objXMLHttp=null;if(window.XMLHttpRequest)
{objXMLHttp=new XMLHttpRequest();}
else if(window.ActiveXObject)
{objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");}
return objXMLHttp;}