Cookie操作

<script>
function getCookieVal(offset)
{
 var iEndStr=document.cookie.indexOf(";",offset);
 if(iEndStr==-1)
 iEndStr=document.cookie.length;
 return unescape(document.cookie.substring(offset,iEndStr));
}
function getCookie(name)
{
 var strArg=name+"=";
 var iArgLength=strArg.length;
 var iCookieLength=document.cookie.length;
 var iIndex=0;
 while(iIndex<iCookieLength)
 {
  var kIndex=iIndex+iArgLength;
  if(document.cookie.substring(iIndex,kIndex)==strArg)
   return getCookieVal(kIndex);
  iIndex=document.cookie.indexOf(" ",iIndex)+1;
  if(iIndex==0)
  break;
 }
 return null;
}
function setCookie(name,value)
{
 var strArgValue=setCookie.arguments;
 var iArgLength=setCookie.arguments.length;
 var expires=(2<iArgLength)?strArgValue[2]:null;
 var path=(3<iArgLength)?strArgValue[3]:null;
 var domain=(4<iArgLength)?strArgValue[4]:null;
 var secure=(5<iArgLength)?strArgValue[5]:false;
 document.cookie=name+"="+escape(value)+((expires==null)?"":(";expires="+expires.toGMTString()))+
((path==null)?"":(";path="+path))+((domain==null)?"":(";domain="+domain))+
((secure==true)?";secure":"");
}
</script>
<input text value="Cookie名" disabled style="border:0px solid"><input type=text id="cookieName" style="border:1px solid"><br>
<input text value="Cookie值" disabled style="border:0px solid"><input type=text id="cookieValue" style="border:1px solid"><br>
<br>
<input type=button value="设置Cookie" onclick="setCookie(document.all.cookieName.value,document.all.cookieValue.value)">
<input type=button value="取值Cookie" onclick="window.confirm(getCookie(document.all.cookieName.value))">