Cache method of cookie in js

function setCookie(name,val，time) //名称、缓存值、缓存时间ms
	{
    
    
		var d = new Date();
		d.setTime(d.getTime()+(time*24*60*60*1000));
		var expires = "expires="+d.toGMTString();
		document.cookie = name + "=" + value + "; " + expires;
	}
function getCookie(cname)
	{
    
    
		var name = cname + "=";
		var ca = document.cookie.split(';');
		for(var i=0; i<ca.length; i++)
		{
    
    
			var c = ca[i].trim();
			if (c.indexOf(name)==0) return c.substring(name.length,c.length);
		}
		return "";
	}