window.onload = init;

function init() {
    var y = document.getElementsByTagName ('tr');
    var m = y.length;
    
    // Zorg dat je alleen te tr's krijgt met een title
    var x = new Array();
    for (var i = 0; i < m; i++) {
        if (y[i].title != '') {
            x[x.length] = y[i];
        }
    }
    var n = x.length;
    
    for (var i = 0; i < n; i++) {
        var bg;
        if (i % 2 == 0) {
            x[i].className = 'tr_bgcolor_normal_1';
            x[i].bg = 1;
        } else {
            x[i].className = 'tr_bgcolor_normal_2';
            x[i].bg = 2;
        }
        x[i].onmouseover = function () {
            return highlight (this);
        }
        x[i].onmouseout = function () {
            return normal (this);
        }
        x[i].onclick = function () {
            var url = this.title;
            return handleclick (url);
        }
    }
}

function highlight (obj) {
    obj.className = 'tr_bgcolor_hover';
}

function normal (obj) {
    if (obj.bg == 1) {
        obj.className = 'tr_bgcolor_normal_1';
    } else {
        obj.className = 'tr_bgcolor_normal_2';
    }
}

function handleclick (url) {
    parent.location = url;
}