function downloadZip()
{
    var inputs = document.getElementsByTagName("input");
    var ids = [];
    var id;
    for (var i=0; i<inputs.length; i++) {
        if (inputs[i].type == "checkbox" && inputs[i].id.indexOf("pageid_") != -1 && inputs[i].checked) {
            id = inputs[i].id.slice(inputs[i].id.indexOf('_') + 1);
            ids.push(id);
        }               
    }
    if (ids.length != 0) {
        window.location = "/downloadzip.aspx?ids=" + ids.toString();
    }
}

function downloadMediaZip() {
    var inputs = document.getElementsByTagName("input");
    var ids = [];
    var id;
    for (var i = 0; i < inputs.length; i++) {
        if (inputs[i].type == "checkbox" && inputs[i].id.indexOf("pageid_") != -1 && inputs[i].checked) {
            id = inputs[i].id.slice(inputs[i].id.indexOf('_') + 1);
            ids.push(id);
        }
    }
    if (ids.length != 0) {
        window.location = "/downloadmediazip.aspx?ids=" + ids.toString();
    }
}