function hide(id) {
    try {
        var e = document.getElementById(id);
        e.style.display = 'none'
    } catch (ex) { }
}

function show(id) {
    try {
        var e = document.getElementById(id);
        e.style.display = 'block'
    } catch (ex) { }
}

function setClass(id, cls) {
    try {
        var e = document.getElementById(id);
        e.setAttribute('class', cls);
        e.setAttribute('className', cls);
    } catch (ex) { }
}

function setvisible(id, visible) {
    try {
        var e = document.getElementById(id);
        if (visible) { e.style.display = 'block' }
        else { e.style.display = 'none' }
    } catch (ex) { }
}

function showTab(id) {
    for (i = 0; i <= 9; i++) {
        try { hide('tabcontent' + i) } catch (ex) { }
        try { setClass('tab' + i, '') } catch (ex) { }
    }
    try { show('tabcontent' + id); } catch (ex) { }
    setClass('tab' + id, 'current');
   // blur();
}