imageArray = new Array();
current = "";

function loadImage(name_src) {
  if(document.images) {
	var temp = imageArray[name_src];
	if(! temp) {
	  temp = new Image();
	  temp.src = name_src;
	  imageArray[name_src] = temp;
	}
	return temp;
  }
}

function replaceImage(name, name_src) {    
  if(document.images) {
	if(name != current) {
	  document[name].src = loadImage(name_src).src;
	}
  }
}

loadImage("images/home_over.gif");
loadImage("images/solutions_over.gif");
loadImage("images/services_over.gif");
loadImage("images/partners_over.gif");
loadImage("images/support_over.gif");
loadImage("images/company_over.gif");