browser_name = navigator.appName; 
browser_version = parseFloat(navigator.appVersion); 

if (browser_name == "Netscape" && browser_version >= 3.0) { roll = 'true'; } 
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0) { roll = 'true'; } 
else { roll = 'false'; } 


function change(img, ref) {
	if (roll == 'true') { 
		document.images[img].src = ref; 
	} 
}
 
function out(img,ref) { 
	if (roll == 'true') { 
		document.images[img].src = ref; 
	} 
} 


if (roll == 'true') 
{ 
a1=new Image;a1.src="img/pict/1_1.jpg";
a2=new Image;a2.src="img/pict/2_2.jpg";
a3=new Image;a3.src="img/pict/3_3.jpg";
a4=new Image;a4.src="img/pict/4_4.jpg";
a5=new Image;a5.src="img/pict/5_5.jpg";
a6=new Image;a6.src="img/pict/6_6.jpg";
} 


//alert(param + "--" + tag);
//document.getElementsByName(tag).src = "img/pict/"+param+"_"+param+".jpg";