function contact_form() {

    if (!document.getElementById || !document.getElementsByTagName || !document.getElementById('contact')) return false;

    var links = document.getElementById('contact').getElementsByTagName('a');

    for (var i = 0; i < links.length; i++) {

        var link = links[i];
        link.onclick = function() { return false; };
        link.onmouseover = function() { this.firstChild.src = clean_src(this.pathname.replace(/0/g,"1")); };
        link.onmouseout = function() { this.firstChild.src = clean_src(this.pathname.replace(/1/g,"0")); };

    }

    return true;

}

function clean_src(src) {

    if (src.substr(0,1) != '/') {

        src = '/' + src;

    }

    return src;

}

addLoadEvent(contact_form);