// JavaScript Document
/* get, set, and delete cookies */
//获取cookies
function getCookie(c_name){
	if (document.cookie.length > 0) {
		c_start = document.cookie.indexOf(c_name + "=");
		if (c_start != -1) {
			c_start = c_start + c_name.length + 1;
			c_end = document.cookie.indexOf(";", c_start);
			if (c_end == -1)
				c_end = document.cookie.length;
			return unescape(document.cookie.substring(c_start, c_end));
		}
	}
	return "";
}
//设置cookies
function setCookie(c_name, value, expiredays){
	var exdate = new Date();
	exdate.setDate(exdate.getDate() + expiredays);
	document.cookie = c_name + "=" + escape(value) +
	((expiredays == null) ? "" : ";expires=" + exdate.toGMTString());
}
	
//删除名称为name的Cookie
function deleteCookie(name) { 	
    var cval = getCookie (name);
    document.cookie = name + "=" + cval + ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
	
}
 
//清除COOKIE
function clearCookies(){
	var temp=document.cookie.split(";");
	var ts;
	for (var i=0;i<temp.length;i++){
		//if(!temp[i]){
		//	break;
		//}else{
			ts=temp[i].split("=")[0];
			deleteCookie(ts);
		//}
	}
}

//验证cookies
function checkCookie(c_name){
	cookies_name = getCookie(c_name);
	if (cookies_name != null && cookies_name != "") {
		return true;
	}else{
		return false;
	}
}