var OP = (window.opera) ? 1:0; 
var IE4 = (document.all && !OP) ? 1:0; 
var IE5 = (IE4 && document.getElementById) ? 1:0; 
var NN4 = (document.layers) ? 1:0; 
var NN6 = (!IE4 && !NN4 && document.getElementById) ? 1:0; 
var NOT = (!OP && !IE4 && !IE5 && !NN4 && !NN6) ? 1:0; 


function setIamgePath(doc, img_name, path){
	if (NN4==1){ 
		//Netscape 4
		doc.layers[img_name].src 			= path
	}else if(NN6==1){ 
		//Netscape 6.x
		doc.getElementById(img_name).src 	= path;
	}else if ((IE5==1)||(IE4==1)){ 
		//Explorer
		doc.all[img_name].src 				= path;
	}
}