var isNav4, isIE4

if(parseInt(navigator.appVersion)>=4) {
	isNav4 = (navigator.appName == "Netscape");
	isIE4 = (navigator.appName.indexOf("Microsoft") != -1)
}


//var styleRef= isIE4 ? ".style" : "";
var docRef= isIE4 ? "document.all." :"document.";


function swopImg(pos,pic){

	var theObj = eval(docRef + pos);
	
	theObj.src = pic

}