var preloadedImages = new Array();


function rollOver(imageName, imageUrl) {
	if(document.images)
		document.images[imageName].src = preloadedImages[imageUrl].src;
}

function rollOn(imageName, imageExt) {
	if(document.images)
		document.images[imageName].src = preloadedImages[imageName + "_on."+imageExt].src;
}
function rollOff(imageName, imageExt) {
	if(document.images)
		document.images[imageName].src = preloadedImages[imageName + "_out."+imageExt].src;
}


function toggleDiv(objId) {
       	  
       if (document.getElementById)
       {
          var obj = document.getElementById(objId);	 
          var im =  objId+'img';	 
 	
          if (obj.style.display == 'block') {
              rollOver(im,'img_plus.gif');
              obj.style.display='none';
             
          } else {
              rollOver(im,'img_minus.gif');
              obj.style.display='block';

          }
        }
}
function preloadImages(imageFolder) {
	if(document.images) {
			var i, args = preloadImages.arguments; 
			for(i=1; i<args.length; i++) {
				preloadedImages[args[i]]   = new Image(); 
				preloadedImages[args[i]].src   = imageFolder + args[i];
			}
	}
}
function bgOn(number) {
if (document.getElementById)
{
   document.getElementById("td"+number).className = 'bgMenuOver'
}

}

function bgOff(number)
{
if (document.getElementById)
{
   document.getElementById("td"+number).className = 'bgMenu'
}
}