highlight lines specified in hash

hashlines.js

$(window).bind('hashchange', function() {
    
    var m  = /\#L(\d+)(\-L(\d+))?/.match(window.location.hash),
        n1 = parseInt(m[1]),
        n2 = parseInt(m[3]),
        i;

    if (!isNaN(n1)) {
        n2 = isNaN(n2) ? n1 : n2;
        for (n1 = 0; i <= n2; i++) {
            $("#L" + i).addClass('highlight');
        }
    }
});