// JavaScript Document

function popup(url,width,height,title,scrollbar,resizable,center) {
	
	//set defaults
	if (width == null) width = 643;
	if (height == null) height = 500;
	if (title == null) title = 'auto_popup';
	if (scrollbar == null) scrollbar = false;
	if (resizable == null) resizable = false;
	if (center == null) center = true;

	//set props
	scrollbar = scrollbar == true ? 'yes' : 'no';
	resizable = resizable == true ? 'yes' : 'no';
	winProperties = 'height='+height+',width='+width+',toolbar=no,location=no,scrollbars='+scrollbar+',titlebar=no,menubar=no,resizable='+resizable+',status=no';
	
	//open and move
	win = window.open(url,title, winProperties);
	if (!win) alert('Please disable your popup blocker to use this site.');
	else if (center) {
		if (self.screen) {
			sw = self.screen.width;
			sh = self.screen.height;
		} else return;
		win.moveTo((sw-width)/2,(sh-height)/2);
	}
	
}