var google_text_color = '#000000';
var google_link_colors = new Array('#ffff66', '#a0ffff', '#99ff99', '#ff9999', '#ff66ff');
function init_google() {
    var pattern = /google\./i;
    if (pattern.exec(document.referrer) != null) {
        var url_parts = document.referrer.split('?');
        if (url_parts[1]) {
            var url_args = url_parts[1].split('&');
            for (var i = 0; i < url_args.length; i++) {
                var keyval = url_args[i].split('=');
                if (keyval[0] == 'q') {
                    go_google(decode_url(keyval[1]));
                    return;
                } 
            } 
        } 
    } 
}
function decode_url(url) {
    return unescape(url.replace(/\+/g, ' '));
}
function go_google(terms) {
    terms = terms.replace(/\"/g, "");
    var terms_split = terms.split(' ');
    var c = 0;
    for (var i = 0; i < terms_split.length; i++) {
        highlight_goolge(terms_split[i], document.body, google_link_colors[c]);
        c = (c == google_link_colors.length - 1) ? 0 : c + 1;
    } 
}
function highlight_goolge(term, container, color) {
    var term_low = term.toLowerCase();
    for (var i = 0; i < container.childNodes.length; i++) {
        var node = container.childNodes[i];
        if (node.nodeType == 3) {
            var data = node.data;
            var data_low = data.toLowerCase();
            if (data_low.indexOf(term_low) != -1) {
                var new_node = document.createElement('SPAN');
                node.parentNode.replaceChild(new_node, node);
                var result;
                while ((result = data_low.indexOf(term_low)) != -1) {
                    new_node.appendChild(document.createTextNode(data.substr(0, result)));
                    new_node.appendChild(create_node_google(document.createTextNode(data.substr(result, term.length)), color));
                    data = data.substr(result + term.length);
                    data_low = data_low.substr(result + term.length);
                }
                new_node.appendChild(document.createTextNode(data));
            }
        } else {
            highlight_goolge(term, node, color);
        } 
    } 
}
function create_node_google(child, color) {
    var node = document.createElement('SPAN');
    node.style.backgroundColor = color;
    node.style.color = google_text_color;
    node.appendChild(child);
    return node;
}
if (window.addEventListener)
    window.addEventListener("load", init_google, false)
else if (window.attachEvent)
    window.attachEvent("onload", init_google)
else if (document.getElementById)
    window.onload = init_google