/* preloadimage */
Images = new Array();

// image url

Images[0]= "/img/photo01_ov.jpg";
Images[1]= "/img/photo02_ov.jpg";
Images[2]= "/img/photo03_ov.jpg";
Images[3]= "/img/photo04_ov.jpg";

// execution

window.onload=function (){
	for(i=0; i<Images.length; i++){
		ImageName = "Image"+ i;
		var ImageName = new Image();
		ImageName.src = Images[i];
	}
}

/* swap image */
function chimg(filename,target){
	document.images[target].src = filename;
}
function chimg2(filename,target){
	document.images[target].src = filename;
}

/* roll over */
function initRollOverImages() {
  var image_cache = new Object();
  $("img.swap").each(function(i) {
    var imgsrc = this.src;
    var dot = this.src.lastIndexOf('.');
    var imgsrc_ov = this.src.substr(0, dot) + '_ov' + this.src.substr(dot, 4);
    image_cache[this.src] = new Image();
    image_cache[this.src].src = imgsrc_ov;
    $(this).hover(
      function() { this.src = imgsrc_ov; },
      function() { this.src = imgsrc; });
  });
}

$(document).ready(initRollOverImages);