function new_window(url, name, width, height, scrollbars, menubar, toolbar, location, directories)
{
	var top = (screen.availHeight - height) / 2;
	var left = (screen.availWidth - width) / 2;

	properties = 'top='+top+', left='+left+', width='+width+', height='+height+', resizable=yes, scrollbars='+scrollbars+', menubar='+menubar+', toolbar='+toolbar+', location='+location+', directories='+directories+''

	window.open(url, name, properties)
}