function openBigImagePopUp (imageFileName) {
	var fName = "bigImage.php?fName=" + imageFileName;
	var windowName = "bigImage";
	var NS6 = (document.getElementById && navigator.appName.indexOf("Netscape")>=0 )? true: false;
	var width = (NS6) ? screen.width : screen.width ;
	var height = (NS6) ? screen.height : screen.height ;
	var scrollbars = "yes";
	openPopup(fName,windowName,width,height,scrollbars);
}