function WM_preloadOnImages() {
  // Don't bother if there's no document.images
  if (document.images) {
    if (typeof(document.WM) == 'undefined'){
      document.WM = new Object();
    }
    document.WM.onImages = new Array();
    // Loop through all the arguments.
    var argLength = WM_preloadOnImages.arguments.length;
    for(arg=0;arg<argLength;arg++) {
      // For each arg, create a new image.
      document.WM.onImages[arg] = new Image();
      
      // Then set the source of that image to the current argument.
      document.WM.onImages[arg].src = WM_preloadOnImages.arguments[arg] + "_On.gif";
    }
  }
}

function WM_preloadOverImages() {
  // Don't bother if there's no document.images
  if (document.images) {
    if (typeof(document.WM) == 'undefined'){
      document.WM = new Object();
    }   
    document.WM.overImages = new Array();
    // Loop through all the arguments.
    var argLength = WM_preloadOverImages.arguments.length;
    for(arg=0;arg<argLength;arg++) {
      // For each arg, create a new image.
      document.WM.overImages[arg] = new Image();
      
      // Then set the source of that image to the current argument.
      document.WM.overImages[arg].src = WM_preloadOverImages.arguments[arg] + "_Over.gif";
    }
  }
}

/* Function that swaps images. */

function di20(id, newSrc) {
	//alert('ID: ' + id + '\nSrc: ' + newSrc);
	document.images[id].src = newSrc;
}