function popup(filePath, windowWidth, windowHeight, windowPadding) {
	// popup params
	var windowWidth   = parseInt(windowWidth);
	var windowHeight  = parseInt(windowHeight);
	var windowPadding = parseInt(windowPadding);
	
	// moving popup window to screen center params
	var availWidth = screen.availWidth;
	var availHeight = screen.availHeight;
	var left = (availWidth-windowWidth) / 2;
	var top  = (availHeight-windowHeight) / 4;
	
	// window.open params
	var relativePath = '';
	var URL   = '';
	var name  = '';
	var specs = '';
	
	
	// Padding in popup window
	if(windowPadding > 0) {
		width  += windowPadding;
		height += windowPadding;
	}

	if(document.all && !navigator.userAgent.toLowerCase().match('opera')) {
		relativePath = '';
	}
	else {
		relativePath = 'index.php/';
	}
	URL    = relativePath+'gal_popup,'+filePath+','+windowWidth+','+windowHeight;
	name   = '';
	specs  = 'width='+windowWidth+',height='+windowHeight+',left='+left+',top='+top;
	specs += ',location=no,menubar=no,resizable=yes,scrollbars=no,statusbar=no,toolbar=no';
	
	// Fire popup
	window.open(URL, name, specs);

}