/******************************************************************************
*                                                                             *
*     customjava.js                                                           *
*                                                                             *
*     Preloads navigator images on Postgrad / Short Courses website           *
*                                                                             *
******************************************************************************/


function popup()
{
 newwin = window.open('','popup','toolbar=no,menubar=no,location=no,status=no,width=580,height=620,screenX=100,left=100,screenY=110,top=110,scrollbars=1,resizable=1');
}



function swapImage()
{
imageArray = new Array('',
   'image1.jpg',
   'image2.jpg',
   'image3.jpg',
   'image4.jpg',
   'image5.jpg',
   'image6.jpg',
   'image7.jpg',
   'image8.jpg',
   'image9.jpg')

   num = Math.round(Math.random()*9)
   if ( (num == 0) || (num >= imageArray.length) ) document.write("<img src='images/image1.jpg'>")
   else document.write("<img src='images/"+imageArray[num]+"'>")
}



function preloadImages()
{
 if (document.images) 
  {
 
   image1       = new Image();
   image1.src   = "graphics/tabs/contact2.gif";

   image2       = new Image();
   image2.src   = "graphics/tabs/links2.gif";

   image3       = new Image();
   image3.src   = "graphics/tabs/location2.gif";

   image4       = new Image();
   image4.src   = "graphics/tabs/search2.gif";

  }
}