Mine

function md5(string){	var xmlHttp;	try 	{    	// Firefox, Opera 8.0+, Safari    	xmlHttp=new XMLHttpRequest();    }	catch (e)    {   		// Internet Explorer    	try      	{      		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");      	}    	catch (e)      	{      		try        	{        		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");        	}      		catch (e)        	{        		alert("Your browser doesnt support AJAX. You need a browser that supports AJAX (Such as: Internet Explorer, Firefox) to view this webpage correctly.");        		return false;        	}		}    }    xmlHttp.onreadystatechange=function()  	{  		if (xmlHttp.readyState==4)    	{			return xmlHttp.responseText;		}  	}	var url = "query.php";	url = url+"?mode=md5";	url = url+"&s="+string;  	xmlHttp.open("GET",url,true);  	xmlHttp.send(null);	}