function win_open(href, width, height)
{
	if ((width == '') &&  (height == ''))  
	{
		window.open(href, '_blank', 'toolbar=no,location=no,status=no,menubar=no,personalbar=no,scrollbars=yes,resizable=yes,screenx=50,left=50,screenY=50,top=50');
	} 
	else
	{
		window.open(href, '_blank', 'toolbar=no,location=no,status=no,menubar=no,personalbar=no,scrollbars=yes,width=' + width + ',height=' + height + ',resizable=yes,screenx=50,left=50,screenY=50,top=50')
	}
}