var IEG5=0,NAVG6=1,EXNONE=-1;
var LAYERSHOW=0,LAYERHIDE=1;
var explorertype;

function WriteExplorerInfo()
{
 document.write("Code Name : ",navigator.appCodeName);
 document.write("<br/>Application Name : ",navigator.appName);
 document.write("<br/>Explorer Version : ",navigator.appVersion);
 document.write("<br/>User Agent : ",navigator.userAgent);
 document.write("<br/>Operating System Name : ",navigator.platform);
 document.write("<br/>Language :",navigator.language);
}

function CheckExplorerType()
{
 if((navigator.appName.indexOf("Microsoft Internet Explorer")!=-1)&&(navigator.appVersion.indexOf("4")!=-1))
  {
   explorertype=IEG5;
   return IEG5;
  }
 else if((navigator.appName.indexOf("Netscape")!=-1)&&(navigator.appVersion.indexOf("5")!=-1))
  {
   explorertype=NAVG6;
   return NAVG6;
  }
 else
  {
   explorertype=EXNONE;
   return EXNONE;
  }
}

CheckExplorerType();

function LayerStatus(layername,state)
{
 var objLayer;
 objLayer=document.getElementById(layername);
 if(state==LAYERSHOW)
  {
   if(explorertype==IEG5)
    {
     objLayer.style.display="";
    }
   else if(explorertype==NAVG6)
    {
     objLayer.style.visibility=true;
    }
   else
    {
     return -1;
    }
  }
 else
  {
   if(explorertype==IEG5)
    {
     objLayer.style.display="none";
    }
   else if(explorertype==NAVG6)
    {
     objLayer.style.visibility=false;
    }
   else
    {
     return -1;
    }
  }
}

function SwapImage(imgTagid,newImgPath)
{
 var objImg;
 objImg=document.getElementById(imgTagid);
 objImg.src=newImgPath;
}

function MenuMouseOver(imgId,imgPath,layerId)
{
 SwapImage(imgId,imgPath);
 LayerStatus(layerId,LAYERSHOW);
}

function MenuMouseOut(imgId,imgPath,layerId)
{
 SwapImage(imgId,imgPath);
 LayerStatus(layerId,LAYERHIDE);
}