function showlayer(myName, myAction) 
{
   var obj, value;
   if ((obj = document.getElementById(myName)) != null) 
   {
      if (obj.style)
      {
         value = (myAction == "show") ? "visible" : "hidden";
         obj.style.visibility = value;
      }
   }
}

function gotosite(url, formSelectId)
{
   var obj;
   obj = document.getElementById(formSelectId);
   if (obj != null)
   {
      var str = obj.options[obj.selectedIndex].value;
      str = str.replace(" ", "+");
      window.location.href = url + str;         
   }
}

function swap(id, picUrl) 
{
   var pic;
   if ((pic = document.getElementById(id)) != null)
   {
      pic.src = picUrl;
   }
}

function clearBox(obj)
{
   if (obj.value == 'search...')
   {
      obj.value = "";
   }
}

var pdTip = null;

function initTip(tags)
{
   var els, txt, el, newDiv, mouseOver, mouseOut;
   var tagList = tags.split(",");
   
   newDiv = document.createElement("div");
   newDiv.id = "pdTip";
   document.body.appendChild(newDiv);
   pdTip = newDiv;
   
   document.onmousemove = function (evt) {moveTip (evt)};
   
   for (var n = 0; n < tagList.length; n++)
   {
      els = document.getElementsByTagName(tagList[n]);
      if (els)
      {
         for (var m = 0; m < els.length; m++)
         {
            el = els[m];
            var aClassName = el.className;
            
            if (aClassName)
            {
               var ttId = aClassName.substr(0,4);
               if (ttId == "pTip")
               {
                  txt = el.getAttribute("title");
                  if (txt)
                  {
                     el.setAttribute("tipText", txt);
                     el.removeAttribute("title");
                     el.removeAttribute("alt");
                     if (el.addEventListener)
                     {
                        el.addEventListener('mouseover', function() {showTip(this)}, false);
                        el.addEventListener('mouseout', function() {hideTip()}, false);
                     }
                     else
                     {
                        el.attachEvent('onmouseover', function(e) {showTipIE(e)});
                        el.attachEvent('onmouseout', hideTip);
                     }
                  }
               }
            }
         }
      }
   }
}

function showTipIE(e)
{
   var el = e.srcElement;
   showTip(el);
}

function showTip(el)
{
   var text;

   text = el.getAttribute("tipText");
   pdTip.innerHTML = text;
   pdTip.style.display = "block";
}

function hideTip()
{
   pdTip.innerHTML = "";
   pdTip.style.display = "none";
}

function moveTip(evt) 
{
   var x=0, y=0;
   if (document.all) {//IE
      x = (document.documentElement && document.documentElement.scrollLeft) ? document.documentElement.scrollLeft : document.body.scrollLeft;
      y = (document.documentElement && document.documentElement.scrollTop) ? document.documentElement.scrollTop : document.body.scrollTop;
      x += window.event.clientX;
      y += window.event.clientY;
      
   } else {//others
      x = evt.pageX;
      y = evt.pageY;
   }
   pdTip.style.left = (x + 2) + "px";
   pdTip.style.top = (y + 18) + "px";
}

//preload images