function void(imgName) {
             if (version == "3") {
             ActiveImage = eval(imgName + "_active.src");
             document [imgName].src = ActiveImage;
             }
     }

function dynamic_image_off(imgName) {
             if (version == "3") {
             DefaultImage = eval(imgName + "_default.src");
             document [imgName].src =DefaultImage;
             }
     }

whichbrowser = navigator.appName;          //identify browser 
Ver = parseInt(navigator.appVersion);  
if (whichbrowser == "Netscape" && Ver >= 3) version = "3";
else version = "2";
if (version == "3") {	// if 3.0, load images 

	img_1_active = new Image(95,168);
	img_1_active.src = "img/demodn.gif";
	img_2_active = new Image(95,168);
	img_2_active.src = "img/asidn.gif";
	img_3_active = new Image(95,168);
	img_3_active.src = "img/successdn.gif";
	img_4_active = new Image(214,130);
	img_4_active.src = "img/seminardn.gif";
          
	img_1_default = new Image(95,168);
	img_1_default.src = "img/demorg.gif";
	img_2_default = new Image(95,168);
	img_2_default.src = "img/asirg.gif";
	img_3_default = new Image(95,168);
	img_3_default.src = "img/successrg.gif";
	img_4_default = new Image(214,130);
	img_4_default.src = "img/seminarrg.gif";    
}