function full_img(idd,gwidth,gheight)
{
	var w = screen.width;
	var h = screen.height;

if (document.all || document.layers) {
   w = screen.availWidth;
   h = screen.availHeight;
}

var popW = gwidth, popH = gheight;

var leftPos = (w-popW)/2;
var topPos = (h-popH)/2;

var page = 'http://www.reisvergelijker.eu/pages/pageparts/popup/full_img.php?id='+idd;

window.open(page,'popup','width=' + popW + ',height=' + popH + ',top=' + topPos + ',left=' + ',leftPostoolbar=no,toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=no,resizable=no,copyhistory=no');

 
}