function Display(id){
	if(document.all || document.getElementById){
		if(document.all){
			obj = document.all(id).style;
		}else if(document.getElementById){
			obj = document.getElementById(id).style;
		}

		if(obj.display == "block"){
			obj.display = "none";
		}else if(obj.display == "none"){
			obj.display = "block";
		}
	}
}


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

$(document).ready(initRollOverImages);