if (document.images) {

	var image1= new Image();
	var image1on = new Image();
	var image2= new Image();
	var image2on = new Image();
	var image3 = new Image();
	var image3on = new Image();
	var image4 = new Image();
	var image4on = new Image();

	image1.src = "../Images/mainnav_aboutus_en.gif";
	image1on.src = "../Images/mainnav_aboutus_over_en.jpg";
	image2.src = "../Images/mainnav_services_en.gif";
	image2on.src = "../Images/mainnav_services_over_en.jpg";
	image3.src = "../Images/mainnav_resourcelibrary_en.gif";
	image3on.src = "../Images/mainnav_rsrclibry_over_en.jpg";
	image4.src = "../Images/mainnav_investors_en.gif";
	image4on.src = "../Images/mainnav_investors_over_en.jpg";
	
}
	
	function OnImage(img1,img2) {
      	on(img1)
      }

      function OffImage(img1, img2) {
            off(img1)
      }

      function on(name) {
            if (document.images) 
            	document[name].src = eval(name + 'on.src')
      }

      function off(name) {
      	if (document.images)
            	document[name].src = eval(name + '.src')
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