//
// google.js
// Google Highlighter
//
// Copyright(C)2001 - 2003
// Cal Henderson <cal@iamcal.com>
//
// Thanks to Ian Beveridge for bugfixes
//
// This code may be freely redistributed,
// providing this message remains intact.
//

//Script featured on & available at Dynamic Drive (http://www.dynamicdrive.com)
//Changes: Modification to window.onload code

var google_text_color = '#000000';

//var google_link_colors = new Array('#ffff66','#a0ffff','#99ff99','#ff9999','#ff66ff');

var google_link_colors = new Array('#FFFF99','#A0FFFF','#99FF99','#FF9831','#FF99FF');   // VinDSL (Lenon.com) 18-Sep-2008

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){
                //term found!
                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{
            //recurse
            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