function createCookie(name,value,days) {
			
			var expires="";
			if(readCookie(name)){
				return;
			}else{
			if (days) {
				var date = new Date();
				date.setTime(date.getTime()+(days*24*60*60*1000));
				expires = "; expires="+date.toGMTString();
			
			}else {
			var date = new Date();
			date.setTime(date.getTime()+(24*60*60*1000));
			expires = "";
		}
		document.cookie = name+"="+value+expires+"; path=/";
	}
}

	function readCookie(name) {

		var nameEQ1 = name + "=";
	
		//alert("read cookie "+document.cookie);
		var ca = document.cookie.split(';');
		for(var i=0;i < ca.length;i++) {
			var c = ca[i];
			//alert(c);
		while (c.charAt(0)==' ') c = c.substring(1,c.length);

		if (c.indexOf(nameEQ1) == 0) {
			return c.substring(nameEQ1.length,c.length);
		}
	}
	return false;
}
function eraseCookie(name) {
	
	var date = new Date();
	//alert("deleting cookie....");
	date.setTime(date.getTime()+(-1*24*60*60*1000));
	var expires = "; expires="+date.toGMTString();
	//alert("deleted");
	document.cookie = name+"="+""+expires+"; path=/";
	
}