Javascript function to decorate all pre/code blocks with "prettyPrint" for Google's code highlighting

pretty_print_helper.js

function styleCode()
{
    if (typeof disableStyleCode != "undefined")
    {
        return;
    }

    var a = false;

    $("pre code").parent().each(function()
    {
        if (!$(this).hasClass("prettyprint"))
        {
            $(this).addClass("prettyprint");
            a = true
        }
    });

    if (a) { prettyPrint() }
}