转 javascript cookies 存、取、删除实例

<script>

//写cookies函数 作者：翟振凯
function SetCookie(name,value)//两个参数，一个是cookie的名子，一个是值
{
var Days = 30; //此 cookie 将被保存 30 天
var exp= new Date(); //new Date("December 31, 9998");
exp.setTime(exp.getTime() + Days*24*60*60*1000);
document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}
function getCookie(name)//取cookies函数
{
var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
if(arr != null) return unescape(arr[2]); return null;

}
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();
}



SetCookie ("xiaoqi", "3")
alert(getCookie('xiaoqi'));
</script>

一个非常实用的javascript读写Cookie函数

一个非常实用的javascript读写Cookie函数
functionGetCookieVal(offset)
//获得Cookie解码后的值
{
varendstr=documents.cookie.indexOf(";",offset);
if(endstr==-1)
endstr=documents.cookie.length;
returnunescape(documents.cookie.substring(offset,endstr));
}
functionSetCookie(name,value)
//设定Cookie值
{
varexpdate=newDate();
varargv=SetCookie.arguments;
varargc=SetCookie.arguments.length;
varexpires=(argc>2)?argv[2]:null;
varpath=(argc>3)?argv[3]:null;
vardomain=(argc>4)?argv[4]:null;
varsecure=(argc>5)?argv[5]:false;
if(expires!=null)expdate.setTime(expdate.getTime()+(expires*1000));
documents.cookie=name+"="+escape(value)+((expires==null)?"":(";expires="+expdate.toGMTString()))
+((path==null)?"":(";path="+path))+((domain==null)?"":(";domain="+domain))
+((secure==true)?";secure":"");
}
functionDelCookie(name)
//删除Cookie
{
varexp=newDate();
exp.setTime(exp.getTime()-1);
varcval=GetCookie(name);
documents.cookie=name+"="+cval+";expires="+exp.toGMTString();
}
functionGetCookie(name)
//获得Cookie的原始值
{
vararg=name+"=";
varalen=arg.length;
varclen=documents.cookie.length;
vari=0;
while(i<clen)
{
varj=i+alen;
if(documents.cookie.substring(i,j)==arg)
returnGetCookieVal(j);
i=documents.cookie.indexOf("",i)+1;
if(i==0)break;
}
returnnull;
}

<SCRIPTlanguage="javascript">
<!--
functionopenpopup(){
url="popup.htm"
window.open("gonggao.htm","gonggao","width=260,height=212,left=200,top=0")
}

functionget_cookie(Name){
varsearch=Name+"="
varreturnvalue="";
if(documents.cookie.length>0){
offset=documents.cookie.indexOf(search)
if(offset!=-1){
offset+=search.length
end=documents.cookie.indexOf(";",offset);
if(end==-1)
end=documents.cookie.length;
returnvalue=unescape(documents.cookie.substring(offset,end))
}
}
returnreturnvalue;
}

functionhelpor_net(){
if(get_cookie('popped')==''){
openpopup()
documents.cookie="popped=yes"
}
}
helpor_net()
//-->
</SCRIPT>