// Utility functions for handling images here

function newImage(arg) {
   var rslt = new Image();
   rslt.src = arg;
   return rslt;
   }

function changeImage(imageName, newImageURL) {
   document[imageName].src = newImageURL;
   }
    
function rollOver(name, href, imageUrl, rolloverImageUrl) {
  document.write("<a href='" + href + "'"
    + " onmouseover=\"changeImage('" + name + "', '" + rolloverImageUrl + "'); return true;\""
    + " onmouseout=\"changeImage('" + name + "', '" + imageUrl + "'); return true;\">"
    + "<img name='" + name + "' border='0' src='" + imageUrl + "'><\/a>");
  }

function rollOverSized(name, href, imageUrl, rolloverImageUrl, width, height) {
  document.write("<a href='" + href + "'"
    + " onmouseover=\"changeImage('" + name + "', '" + rolloverImageUrl + "'); return true;\""
    + " onmouseout=\"changeImage('" + name + "', '" + imageUrl + "'); return true;\">"
    + "<img name='" + name + "' border='0' src='" + imageUrl + "' width='" + width + "' height='" + height + "'><\/a>");
  }

function rollOverTarget(name, href, imageUrl, rolloverImageUrl, target) {
  document.write("<a href='" + href + "' target='" + target + "'"
    + " onmouseover=\"changeImage('" + name + "', '" + rolloverImageUrl + "'); return true;\""
    + " onmouseout=\"changeImage('" + name + "', '" + imageUrl + "'); return true;\">"
    + "<img name='" + name + "' border='0' src='" + imageUrl + "'><\/a>");
  }

// Basically, force these images to pre-load when this javascript file is loaded in the <HEAD> 
// of the HTML before anything else is loaded

//-- empty image
var spacer = newImage('common/img/spacer.gif');

//-- logo images
var logo = newImage('common/img/logo.gif');

//-- misc images
/*
var alertIcon = newImage('common/img/alertIcon.gif');
var underConstruction = newImage('common/img/under-construction.gif');
var black = newImage('common/img/black.gif');
var background = newImage('common/img/background.gif');
*/

//-- border images

//-- nav bar images

//-- button images

//-- bullet images

