opt = "toolbar=no,location=no,directories=no,status=yes,menubar=no,resizable=yes,copyhistory=no,";

function openchild(page,width,height) {
// usage: onclick="return openchild('page.shtml')"
 if (!(width)) {width=470} else {width+=25}
 if (!(height)){height=400}else {height+=45} 
 
 var img = /\.(jpg|jpeg|gif|png)$/;
 var scrollbars = (img.test(page) == false)? 'yes' : 'no';
 
 window.open(page,"_blank",opt+'scrollbars='+scrollbars+',width='+width+', height='+height);
 return false;
}

function swapimg(imgname,imgsrc) {
// usage: onmouseover="swapimg('imgname','imgsrc')"
  document.images[imgname].src=imgsrc
}