/*
*    Written by Jonathan Snook, http://www.snook.ca/jonathan
*    Add-ons by Robert Nyman, http://www.robertnyman.com
*/
function getElementsByClassName(oElm, strTagName, oClassNames){
    var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    var arrRegExpClassNames = new Array();
    if(typeof oClassNames == "object"){
        for(var i=0; i<oClassNames.length; i++){
            arrRegExpClassNames.push(new RegExp("(^|\s)" + oClassNames[i].replace(/-/g, "\-") + "(\s|$)"));
        }
    }
    else{
        arrRegExpClassNames.push(new RegExp("(^|\s)" + oClassNames.replace(/-/g, "\-") + "(\s|$)"));
    }
    var oElement;
    var bMatchesAll;
    for(var j=0; j<arrElements.length; j++){
        oElement = arrElements[j];
        bMatchesAll = true;
        for(var k=0; k<arrRegExpClassNames.length; k++){
            if(!arrRegExpClassNames[k].test(oElement.className)){
                bMatchesAll = false;
                break;
            }
        }
        if(bMatchesAll){
            arrReturnElements.push(oElement);
        }
    }
    return (arrReturnElements)
}

/*
* Written by Cadu de Castro Alves, http://www.cadudecastroalves.com
* Based on Emanuele Feronato technique, http://www.emanueleferonato.com/2007/08/22/create-a-lightbox-effect-only-with-css-no-javascript-needed/
*/
function lightbox() {
    var anchor        = getElementsByClassName(document, 'a', 'light-box');
    var closeButton    = getElementsByClassName(document, 'a', 'close-button');

    var black    = document.getElementById('fade');
        black.style.display = 'none';
    var light    = document.getElementById('light');
        light.style.display = 'none';

    if(anchor) {
        for(var i = 0; i < anchor.length; i++) {
            anchor[i].onclick = function() {
                if(black.style.display == 'none' && light.style.display == 'none') {
                    black.style.display = 'block';
                    light.style.display = 'block';
                }
            };
        }
    }

    if(closeButton) {
        for(var j = 0; j < closeButton.length; j++) {
            closeButton[j].onclick = function() {
                black.style.display = 'none';
                light.style.display = 'none';
            };
        }
    }
}