// return "id" object on all browsers
function getObject(id) {
    if(document.getElementById) {
        obj = document.getElementById(id);
    }
    else if(document.all) {
        obj = document.all.item(id);
    }
    else {
        obj = null;
    }
    return obj;
}
// show "pane#" and set "tab#" as active
function showTab(id) {
    hideTab();
    activeTab = id;
    getObject("tab" + id).className = "tabActive";
    getObject("pane" + id).className = "tabPaneActive";
}
// hide active pane
function hideTab() {
    getObject("pane" + activeTab).className = "tabPane";
    getObject("tab" + activeTab).className = "tab";
}


activeTab = 1;