function addCookie(name,value,expireHours){ 
	var cookieString=name+"="+escape(value); 
	if(expireHours>0){ 
	var date=new Date(); 
	date.setTime(date.getTime+expireHours*3600*1000); 
	cookieString=cookieString+"; expire="+date.toGMTString(); 
	} 
	document.cookie=cookieString; 
} 
function getCookie(name){ 
	var strCookie=document.cookie; 
	var arrCookie=strCookie.split("; "); 
	for(var i=0;i<arrCookie.length;i++){ 
		var arr=arrCookie[i].split("="); 
		if(arr[0]==name)return arr[1]; 
	} 
	return ""; 
}

function deleteCookie(name){ 
	var date=new Date(); 
	date.setTime(date.getTime()-10000); 
	document.cookie=name+"=v; expire="+date.toGMTString(); 
}