// Popup window
function popup(url, name, width, height, scrollbars){
	
	// Set position
	var left = Math.round((screen.width-width)/2);
	var top = Math.round((screen.height-height)/2);
	
	// Set scrollbars
	scrollbars = (scrollbars) ? 'yes' : 'no';
	
	var settings  ='height=' + height + ',';
		settings +='width=' + width + ',';
		settings +='top=' + top + ',';
		settings +='left=' + left + ',';
		settings +='scrollbars=' + scrollbars;
		
	// Open window
	win = window.open(url, name, settings);
	
	// Focus window
	if(parseInt(navigator.appVersion) >= 4){
			win.window.focus();
	}
};