jQuery CSS print

http://wiki.guoshuang.com/Jquery%E4%BA%94%E4%B8%AA%E5%B0%8F%E6%8A%80%E5%B7%A7

link rel="stylesheet" type="text/css" media="screen" href="Normal.css"

$("#StyleContrast").click(function() {
$("link[media='screen']").attr("href", "Contrast.css");
});

$("#StylePrint").click(function() {
$("link[media='screen']").attr("href", "Print.css");
});

$("#StyleNormal").click(function() {
$("link[@media='screen']").attr("href", "Normal.css");
});