//add ref=etc. to front of the existing cookie - this code should be on every page(?)
//must read existing cookie, and rewrite it

function setCookie(){
	//alert("cookie before setCookie="+unescape(document.cookie));
	var str=unescape(document.cookie);
	//alert("substring="+str.substring(0,3));
	if(str.substring(0,3)!="ref"){
		expireDate=new Date;// get the current date
		expireDate.setDate(expireDate.getDate());
		expireDate.setHours(expireDate.getHours()+1);
		if(document.referrer!="")
			ref="ref="+document.referrer;
		else
			ref="ref="+"none";
		
		var i=0;
		
		
		document.cookie=escape(ref+";expires="+expireDate.toGMTString());
		//alert("cookie after setCookie="+unescape(document.cookie));
		
	}//end if
}//end function setCookie)()