function createCookie(name,value,days){
	if(days){
		var date=new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires="; expires="+date.toGMTString();
	}else{
	    var expires = "";
	}
	document.cookie=name+"="+value+expires+"; path=/";
};
function readCookie(name){
	var nameEQ=name+"=";
	var ca=document.cookie.split(';');
	for(var i=0;i<ca.length;i++){
		var c=ca[i];
		while(c.charAt(0)==' '){
		    c = c.substring(1,c.length);
		}
		if(c.indexOf(nameEQ) == 0){
		    return c.substring(nameEQ.length,c.length);
		}
	}
	return null;
};
function eraseCookie(name){
	createCookie(name,"",-1);
};
function createCookieObj(cname,obj,days){
	if(days){
		var date=new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires="; expires="+date.toGMTString();
	}else{
	    var expires = "";
	}
	var cookiestr='';
	for(var name in obj){
	    cookiestr+='&'+name+'='+obj[name];
	}
	cookiestr=cookiestr.replace('&','');
	document.cookie=cname+'='+cookiestr+expires+"; path=/";
};