js setCookie和getCookie

	
	function setCookie(name,value){
		var Days = 30;
		var exp = new Date();
		exp.setTime(exp.getTime() + Days*24*60*60*30);
		document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
	}
	
	function getCookie(name){
		var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
		if(arr=document.cookie.match(reg))
		return unescape(arr[2]);
		else
		return null;
	}