function over(num) {
	if (document.images) {
		if (document.layers) eval('document.navigator.document.images["i'+num+'"].src = a'+ num +'.src')
		else eval('document.images["i'+ num +'"].src = a'+ num +'.src')
	}
}

function out(num) {
	if (document.images) {
		if (document.layers) eval('document.navigator.document.images["i'+num+'"].src = n'+ num +'.src')
		else eval('document.images["i'+ num +'"].src = n'+ num +'.src')
	}
}


<!--
function openWindow(sPage, width, height)
{
	var sFeatures= "top=0, left=0, width="+width+", height="+height+", " + "toolbar=no, menubar=no, location=no, directories=no, resizable=no, scrollbars=no";
	var oNewWindow = window.open(sPage, "", sFeatures, true);
}
//-->

    if (document.images){

       for (var j=0; j<6; j++){

        eval('n'+ j +' = new Image()');

        eval('n'+ j +'.src = "n'+ j +'.jpg"');

        eval('a'+ j +' = new Image()');

        eval('a'+ j +'.src = "a'+ j +'.jpg"');

        }

    }