JS窗口打開，區分分辨率同時可指定窗口大小

//窗口打開，區分分辨率同時可指定窗口大小
function openwin(furl, width, height)
{
	height = height - 30;
	c_x = screen.width - width - 40;
	
	if (c_x > 0)
	    {
	    c_x = c_x / 2;
	    }
	
	else
	    {
	    c_x = 0;
	    }
	
	c_y = screen.height - height - 180;
	
	if (c_y > 0)
	    {
	    c_y = c_y / 2;
	    }
	
	else
	    {
	    c_y = 0;
	    }
	
	window.open(furl,
	            '',
	            "width=" + width + ",height=" + height + ",top=" + c_y + ",left=" + c_x
	                + ",resizable=yes,scrollbars=yes,status=yes,toolbar=no,menubar=no,location=no");
}