function SubmitForm(e, btnId, doValidation, postBackUrl)
{
    if (e.keyCode && e.keyCode == 13)
    {
        var postBackUrl = (typeof postBackUrl == 'undefined') ? "" : postBackUrl;    
        
        try
        {
            WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(btnId, "", doValidation, "", postBackUrl, false, true));
        }
        catch(err)
        {
            __doPostBack(btnId,'');
        }        
    }
}
function checkAllBoxes(grdSubscribersCount) {
    var totalChkBoxes = parseInt(grdSubscribersCount);
    var gvControl = document.getElementById('ctl00_phBody_grdSubscribers');

    var gvChkBoxControl = "cboxSelect";

    var mainChkBox = document.getElementById("ctl00_phBody_grdSubscribers_ctl01_cboxSelectAll");

    var inputTypes = gvControl.getElementsByTagName("input");

    for (var i = 0; i < inputTypes.length; i++) {
        if (inputTypes[i].type == 'checkbox' && inputTypes[i].id.indexOf(gvChkBoxControl, 0) >= 0)
            inputTypes[i].checked = mainChkBox.checked;
    }
}