var newwindow = ''
function popitup(url,w,h) {
if (newwindow.location && !newwindow.closed) {
    newwindow.location.href = url;
    newwindow.focus(); }
else
	{
    newwindow=window.open(url,'htmlname','width='+w+',height='+h+',resizable=0, left=50, top=50')
	}

}

function tidy() {
if (newwindow.location && !newwindow.closed) {
   newwindow.close(); }
}

function doNothing() {
}