onload = function() {
    var e, i = 0;
    while (e = document.getElementById('Restliste').getElementsByTagName ('DIV') [i++]) {
        if (e.className == 'tab_1' || e.className == 'tab_0') {
        e.onclick = function () {
            var getEls = document.getElementsByTagName('DIV');
                for (var z=0; z<getEls.length; z++) {
                if (getEls[z].className == 'tab_1' || getEls[z].className == 'tab_0' || getEls[z].className == 'tab_c_1' || getEls[z].className == 'tab_c_0') {
                getEls[z].className=getEls[z].className.replace('tab_c_1', 'tab_c_0');
                getEls[z].className=getEls[z].className.replace('tab_1', 'tab_0');
                }
                }
            this.className = 'tab_1';
            var max = this.getAttribute('title');
            document.getElementById(max).className = "tab_c_1";
            }
        }
    }
}