function swapPane(btn) {
    var allBtnContainer = btn.parentNode.parentNode;
    var allBtns = allBtnContainer.getElementsByTagName("a");
    var allPanes = document.getElementsByTagName("div");
    var buttonNumber = 0;
    var paneNumber = 0;
    var i;
    for (i = 0; i < allBtns.length; i++) {
        allBtns[i].className = "off";
        if (allBtns[i] == btn) {
            allBtns[i].className = "on";
            buttonNumber = i;
        }
    }
    var k;
    for (k = 0; k < allPanes.length; k++) {
        if (allPanes[k].className.indexOf("selector_pane") !=-1 && allPanes[k].className.indexOf("_container")==-1) {
            allPanes[k].className = "selector_pane";
            if (paneNumber == buttonNumber) {
                allPanes[k].className = allPanes[k].className + " on";
            }
            paneNumber++;
        }
    }
}

function inputError(inputName) {
   alert(inputName)
}