javascript cookies操作集合

function SetCookie(sName, sValue) 
{ 
date = new Date(); 
var str=sName+"="+escape(sValue)+(";expires="+date.toGMTString())+";path=/"; 
str=str.replace("2010","2099"); 

document.cookie=str; 
alert("恭喜,已成功屏蔽脚本之家所有广告,只要不清空Cookie,您都不会再受脚本之家广告困扰！"); 
//alert(unescape(document.cookie)); 
} 

function DelCookie(name) 
//删除Cookie 
{ 
var exp = new Date(); 
exp.setTime (exp.getTime() - 1); 
var cval = GetCookie (name); 
if(cval!=null) document.cookie = name + "=" + cval + "; expires="+ exp.toGMTString()+";path=/"; ; 
} 
function NoCookie(sName, sValue) 
{ 
date = new Date(); 
var str=sName+"="+escape(sValue)+(";expires="+date.toGMTString())+";path=/"; 
str=str.replace("2010","2009"); 

document.cookie=str; 
alert("您已经恢复到脚本之家广告版，谢谢您对脚本之家的支持！"); 
//alert(unescape(document.cookie)); 
}

function setCookie(name, value) //cookies设置JS 
{ 
var argv = setCookie.arguments; 
var argc = setCookie.arguments.length; 
var expires = (argc > 2) ? argv[2] : null; 
if(expires!=null) 
{ 
var LargeExpDate = new Date (); 
LargeExpDate.setTime(LargeExpDate.getTime() + (expires*1000*3600*24)); 
} 
document.cookie = name + "=" + escape (value)+((expires == null) ? "" : ("; expires=" +LargeExpDate.toGMTString())); 
} 

function getCookie(Name) //cookies读取JS 
{ 
var search = Name + "=" 
if(document.cookie.length > 0) 
{ 
offset = document.cookie.indexOf(search) 
if(offset != -1) 
{ 
offset += search.length 
end = document.cookie.indexOf(";", offset) 
if(end == -1) end = document.cookie.length 
return unescape(document.cookie.substring(offset, end)) 
} 
else return "" 
} 
}