Shortcut function for top-down css gradients, written in stylus

gistfile1.css

// Shortcut for top-down gradient background color
td_gradient(color1, color2)
	background-color (color1 + (color2 - color1) / 2)
	background -webkit-gradient(linear, 0% 0%, 0% 100%, from(color1), to(color2))
	background -webkit-linear-gradient(top, color1, color2)
	background -moz-linear-gradient(top, color1, color2)
	background -ms-linear-gradient(top, color1, color2)
	background -o-linear-gradient(top, color1, color2)
	@css
	{
		filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=color1, endColorstr=color2);
	}