function makePopup(href, target, w, h, ext){
w=(w?w:parseInt((screen.availWidth)/2))+20
h=(h?h:parseInt((screen.availHeight)/2))+30
l=parseInt((screen.availWidth-w)/2),
t=parseInt((screen.availHeight-h)/2)-10;
if (typeof(target)!="string"||(!target)) target="_blank";
window.open(href, target, 'location=no,menubar=no,resizable=yes,status=no,toolbar=no,width='+w+',height='+h+',left='+l+',top='+t+(ext?','+ext:''));
}

function makePopupSBno(href, target, w, h, ext){
makePopup(href, target, w, h, "scrollbars=0"+(ext?','+ext:''))
}
function makePopupSByes(href, target, w, h, ext){
makePopup(href, target, w+20, h, "scrollbars=1"+"resizable=1"+(ext?','+ext:''))
}

function makePopupWithSize(href, target, ext){
 var img = new Image;
 img.src=href;
 var w = img.width;
 var h = img.height;
makePopup(href, target, w, h, "scrollbars=0"+(ext?','+ext:''))
}