function popup(url,w,h,s)
	{
		var oW=window.open(url,'popup','width='+w+',height='+h+',directories=0,location=0,menubar=0,resizable=0,scrollbars='+s+',status=0,toolbar=0,marginleft=0,margintop=0,left='+(((screen.availWidth-w)/2)+-10)+',top='+(((screen.height-h)/2)+-10));
	}

	function popup_resize(url,w,h,s)
	{
		var largura = screen.width;
		var altura =  screen.height;

		if(largura >= 640)
		{
			var oW=window.open(url,'popup','width='+largura+',height='+altura+',directories=0,location=0,menubar=0,resizable=0,scrollbars='+s+',status=0,toolbar=0,marginleft=0,margintop=0,left='+(((screen.availWidth-w)/2)+-10)+',top='+(((screen.height-h)/2)+-10));
		}
		else
		{
			var oW=window.open(url,'popup','width='+w+',height='+h+',directories=0,location=0,menubar=0,resizable=0,scrollbars='+s+',status=0,toolbar=0,marginleft=0,margintop=0,left='+(((screen.availWidth-w)/2)+-10)+',top='+(((screen.height-h)/2)+-10));	
		}
	}