var xmlHttp

	function showHint(str){
		if (str.length==0){ 
 			 document.getElementById("txtHint").innerHTML="";
 			return;
	  	}
		xmlHttp=GetXmlHttpObject()
		if (xmlHttp==null){
  				alert ("Your browser does not support AJAX!");
  				return;
  		} 
  		
		var url="../shared/gethint.php";
		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){ 
			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;
}