// brake any referring site who is using frames
function abcFrameBuster() {
    if (self.parent.frames.length != 0){
        self.parent.location=document.location;
    }
}

//abcFrameBuster();

function showObject(e) {

    var elem = document.getElementById(e);
    elem.style.display = 'block';

}

function hideObject(e) {

    elem = document.getElementById(e);
    elem.style.display = 'none';

}
function abcSkyscraper(e) {

    var elem = document.getElementById(e);
    var ranNum= Math.floor(Math.random()*10) + 1;
    elem.src = 'http://www.abcteach.com/cmd/text_ads.php?id=' + ranNum;

}

function slBanner(i, a) {
    
    var imgelem = document.getElementById(i);
    var linkelem = document.getElementById(a);


    var ranNum= Math.floor(Math.random()*4) + 1;
    switch (ranNum) {
        case 1:
           imgelem.src = 'http://www.abcteach.com/ads/sitelicensebanner.jpg';
           linkelem.href = '/site_license_benefits.php';
          break;
        case 2:
           imgelem.src = 'http://www.abcteach.com/images/ads/mail.jpg';
           linkelem.href = '/site_license_benefits.php';
          break;
        case 3:
           imgelem.src = 'http://www.abcteach.com/images/ads/mail-2.jpg';
           linkelem.href = '/site_license_benefits.php';
          break;
        case 4:
           imgelem.src = 'http://www.abcteach.com/images/ads/mail-3.jpg';
           linkelem.href = '/site_license_benefits.php';
          break;
     }

}

function abcBanner(i, a) {
    
    var imgElem = document.getElementById(i);
    var linkElem = document.getElementById(a);


    var ranNum= Math.floor(Math.random()*10) + 1;
    switch (ranNum) {
        case 1:
            imgElem.src = 'http://static.abcteach.com/ads/HandwritingGeneratorBanner.jpg';
            linkElem.href = '/directory/basics/handwriting/';
            break;
        case 2:
            imgElem.src = 'http://static.abcteach.com/ads/CrosswordPuzzleGenerators.jpg';
            linkElem.href = '/directory/fun_activities/crossword_puzzles/';
            break;
        case 3:
            imgElem.src = 'http://static.abcteach.com/ads/WordSearchBanner.jpg';
            linkElem.href = '/directory/fun_activities/word_searches/';
            break;
        case 4:
            imgElem.src = 'http://static.abcteach.com/ads/SudokuPuzzleGenerators.jpg';
            linkElem.href = '/directory/fun_activities/puzzle_fun/sudoku/';
          break;
        case 5:
            imgElem.src = 'http://static.abcteach.com/ads/UniversityPartnerBanner.jpg';
            linkElem.href = '/universities.php';
          break;
        case 6:
           imgElem.src = 'http://static.abcteach.com/ads/GiftBanner.jpg';
            linkElem.href = '/gift.php';
            break;
        case 7:
           imgElem.src = 'http://static.abcteach.com/ads/MathGeneratorBanner.jpg';
           linkElem.href = '/directory/basics/math/';
           break;
        case 8:
           imgElem.src = 'http://static.abcteach.com/ads/MissingLetterGeneratorBanne.jpg';
           linkElem.href = '/directory/basics/spelling/fillin_letter_worksheets/';
           break;
        case 9:
           imgElem.src = 'http://static.abcteach.com/ads/WordWallGeneratorBanner.jpg';
           linkElem.href = '/directory/teaching_extras/word_walls/';
          break;
        case 10:
           imgElem.src = 'http://static.abcteach.com/ads/SiteLicenseBanner.jpg';
           linkElem.href = '/site_license_benefits.php';
          break;
     }

}

function mass(form) {
    var i=0;
    var value=0;

    if (form.toggle_all.checked) {
        value=1;
    } else {
        value=0;
    }

    for (i = 0; i < form.length; i++) {
        if (form.elements[i].name.substring(0, 8) == 'checkbox' && !form.elements[i].disabled) {
            form.elements[i].checked = value;
        }
    }
}