var back_off = new Image();
back_off.src = "http://www.pasttimesproject.co.uk/images/back1.gif";
var back_on = new Image();
back_on.src = "http://www.pasttimesproject.co.uk/images/back2.gif";

function activate(imgname){
	document.images[imgname].src = eval(imgname + "_on.src");
}

function deactivate(imgname){
	document.images[imgname].src = eval(imgname + "_off.src");
}
function openWin (url,scroll,height,width) {
	win = window.open(url,'prodWin','resizable=yes,titlebars=yes,location=yes,menubar=yes,toolbar=yes,status=yes,scrollbars=' + scroll + ',height=' + height + ',width='+ width )
}