/*

Changes the big image on the page
to another image everytime a link is clicked or
when the page is refreshed

*/

var bigImage = new Array ()

bigImage[0] = 'images/bigimage/image1.png'
bigImage[1] = 'images/bigimage/image2.png'
bigImage[2] = 'images/bigimage/image3.png'
bigImage[3] = 'images/bigimage/image4.png'
bigImage[4] = 'images/bigimage/image5.png'
bigImage[5] = 'images/bigimage/image6.png'
bigImage[6] = 'images/bigimage/image7.png'
bigImage[7] = 'images/bigimage/image8.png'
bigImage[8] = 'images/bigimage/image9.png'
bigImage[9] = 'images/bigimage/image10.png'

var j = 0
var p = bigImage.length;
var preBuffer = new Array()
for (i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = bigImage[i]
}
var whichImage = Math.round(Math.random()*(p-1));
function showImage(){
document.write('<img src="'+bigImage[whichImage]+'">');
}


/* 

Changes the buttons background color
	OnClick to stay highlighted while on that page
	
*/

var buttonClick = ['home', 'about', 'news', 'media', 'partners', 'contact']; 
    function changeBGColor(a){ 
        for(i=0; i<buttonClick.length; i++){ 
        document.getElementById(buttonClick[i]).style.backgroundImage = "url(../images/NavBackground_Image.jpg)"; 
        } 
    document.getElementById(a).style.backgroundImage = "url(../images/Navigation_rollover.jpg)"; 
    }
	
	
/*
 
Correctly handle PNG transparency in Win IE 5.5 & 6.
http://homepage.ntlworld.com/bobosola. Updated 18-Jan-2006.

Use in <HEAD> with DEFER keyword wrapped in conditional comments:
<!--[if lt IE 7]>
<script defer type="text/javascript" src="pngfix.js"></script>
<![endif]-->

*/

var arVersion = navigator.appVersion.split("MSIE")
var version = parseFloat(arVersion[1])

if ((version >= 5.5) && (document.body.filters)) 
{
   for(var i=0; i<document.images.length; i++)
   {
      var img = document.images[i]
      var imgName = img.src.toUpperCase()
      if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
      {
         var imgID = (img.id) ? "id='" + img.id + "' " : ""
         var imgClass = (img.className) ? "class='" + img.className + "' " : ""
         var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
         var imgStyle = "display:inline-block;" + img.style.cssText 
         if (img.align == "left") imgStyle = "float:left;" + imgStyle
         if (img.align == "right") imgStyle = "float:right;" + imgStyle
         if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
         var strNewHTML = "<span " + imgID + imgClass + imgTitle
         + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
         + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
         + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
         img.outerHTML = strNewHTML
         i = i-1
      }
   }
}
