/*
 * function SetCookie(name, value, hours){ 
	var expire = ""; 
	if(hours != null){ 
		expire = new Date((new Date()).getTime() + hours * 3600000); 
		expire = "; expires=" + expire.toGMTString(); 
	} 
	document.cookie = name + "=" + escape(value) + expire + '; path=/'; 
}
*/

function SetCookie(name,value)
{
  var Days = 1; //此 cookie 将被保存 30 天
  var exp  = new Date();    //new Date("December 31, 9998");
  exp.setTime(exp.getTime() + Days*18*60*60*1000);	// 18个小时
  document.cookie = name + "="+ escape(value) +";expires="+ exp.toGMTString();
}

function GetCookie(name)
{
  var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
  if(arr != null) return unescape(arr[2]); return null;
}

function GetCookieVal(offset) 
//获得Cookie解码后的值 
{
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}

//

function delCookie(name)
{
  var exp = new Date();
  exp.setTime(exp.getTime() - 1);
  var cval=getCookie(name);
  if(cval!=null) document.cookie=name +"="+cval+";expires="+exp.toGMTString();
}

//--------------------------------