function HideElement(elementId, checkBoxId) 
{
//    if (!document.getElementById || !document.createTextNode) 
//    {
//        return true; 
//    }
//    var element = document.getElementById(elementId);
//    var checkBox = document.getElementById(checkBoxId);
//    if (checkBox.checked == true) 
//    {
//        element.style.visibility = 'visible';

//    }
//    else 
//    {
//        element.style.visibility = 'hidden';
//    }
    //    return false;
    return true;
}

//<a href="http://www.mydomain.com" onclick="NewWindow(this.href,'newwindow','750','750','yes','center');return false" onfocus="this.blur()">YourLinkText</a>
function NewWindow(mypage, myname, w, h, scroll, pos) {
    if (pos == "random") {
        LeftPosition = (screen.width) ? Math.floor(Math.random() * (screen.width - w)) : 100;
        TopPosition = (screen.height) ? Math.floor(Math.random() * ((screen.height - h) - 75)) : 100;
    }
    if (pos == "center") {
        LeftPosition = (screen.width) ? (screen.width - w) / 2 : 100;
        TopPosition = (screen.height) ? (screen.height - h) / 2 : 100;
    }
    else
        if ((pos != "center" && pos != "random") || pos == null) {
        LeftPosition = 0;
        TopPosition = 20;
    }
    settings = 'width=' + w + ',height=' + h + ',top=' + TopPosition + ',left=' + LeftPosition + ',scrollbars=' + scroll + ',location=no,directories=no,status=yes,menubar=no,toolbar=no,resizable=yes,copyhistory=no';
    window.open(mypage, myname, settings);
}