dwr中tabs的修改（支持记忆）

在使用tabs这样的控件时，发现dwr中的tabs非常简单，代码非常少，
所以就决定用这个了。
不过问题出来了。当我在tabs不是第一个中有按钮的时候，点击查询等应用，就会自动跳到第一个，非常不适用，所以决定修改
，使用点击非第一个里面的按钮能继续在原地方
--------简单修改后的tabs.js如下----------------------

function Tabs() { }

//Tabs.removeSelectedRegex = new RegExp("(^|\\s)linkSelected(\\s|$)", 'g');
//Tabs.removeUnselectedRegex = new RegExp("(^|\\s)linkUnselected(\\s|$)", 'g');

/**
*
*/
Tabs.init = function(tabListId) {
  Tabs.tabLinks = document.getElementById(tabListId).getElementsByTagName("A");

  var link, tabId, tab;
  var hasTabId="false";
  var oldTabId  = getTabCookie("tabId");
  for (var i = 0; i < Tabs.tabLinks.length; i++)
  {
    link = Tabs.tabLinks[i];
    tabId = link.getAttribute("tabId");
    if (!tabId) alert("Expand link does not have a tabId element: " + link.innerHTML);
    tab = document.getElementById(tabId);
    if (!tab) alert("tabId does not exist: " + tabId);

    if (tabId==oldTabId)
    {
    hasTabId="true";
         tab.style.display = "block";
         link.className = "linkSelected " ;//+ link.className.replace(Tabs.removeUnselectedRegex, '');
    }
    else {
         tab.style.display = "none";
         link.className = "linkUnselected " ;//+ link.className.replace(Tabs.removeSelectedRegex, '');
         }

        link.onclick = function() {
        var tabId = this.getAttribute("tabId");
        setTabCookie("tabId",tabId);     
        for (var i = 0; i < Tabs.tabLinks.length; i++)
        {
           var link = Tabs.tabLinks[i];
           var loopId = link.getAttribute("tabId");
           if (loopId == tabId)
           {
              document.getElementById(loopId).style.display = "block";
              link.className = "linkSelected " ;//+ link.className.replace(Tabs.removeUnselectedRegex, '');
           }
           else
           {
             document.getElementById(loopId).style.display = "none";
             link.className = "linkUnselected " ;//+ link.className.replace(Tabs.removeSelectedRegex, '');
           }
        }
      if (this.blur) this.blur();
      return false;
    }
  }
  if(hasTabId=="false")
    {
    link = Tabs.tabLinks[0];
tabId = link.getAttribute("tabId");
   if (!tabId) alert("Expand link does not have a tabId element: " + link.innerHTML);
   tab = document.getElementById(tabId);
    if (!tab) alert("tabId does not exist: " + tabId);
   tab = document.getElementById(tabId);
   tab.style.display = "block";
      link.className = "linkSelected " ;//+ link.className.replace(Tabs.removeUnselectedRegex, '');
    }
}
function setTabCookie(name,value)
{
var exp = new Date();
exp.setTime (exp.getTime()+3600000000);
document.cookie = name + "=" + value + "; expires=" + exp.toGMTString();
}
function getTabCookie(name)
{
var arg = name + "=";
    var alen = arg.length;
    var clen = document.cookie.length;
    var i = 0;
    while (i < clen)
    {
        var j = i + alen;
        if (document.cookie.substring(i, j) == arg)
            return getCookieVal (j);
        i = document.cookie.indexOf(" ", i) + 1;
        if (i == 0)
            break;
    }
    return null;

}

//cookie的相关函数
function getCookieVal (offset)
{
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1) endstr = document.cookie.length;
    return unescape(document.cookie.substring(offset, endstr));
}