function overlay(curobj, subobjstr, opt_position) {


    if (document.getElementById) {
        var subobj = document.getElementById(subobjstr)


        subobj.style.display = (subobj.style.display != "block") ? "block" : "none"
        var xpos = getposOffset(curobj, "left") + ((typeof opt_position != "undefined" && opt_position.indexOf("right") != -1) ? -(subobj.offsetWidth - curobj.offsetWidth) : 0)
        var ypos = getposOffset(curobj, "top") + ((typeof opt_position != "undefined" && opt_position.indexOf("bottom") != -1) ? curobj.offsetHeight : 0)
        subobj.style.left = xpos + "px"
        subobj.style.top = ypos + "px"
        //document.getElementById('popupzipcode').focus();
        return false
    }
    else
        return true
}

function overlayClose(subobj) {

    document.getElementById(subobj).style.display = "none"
}

function getposOffset(overlay, offsettype) {
    var totaloffset = (offsettype == "left") ? overlay.offsetLeft : overlay.offsetTop;
    var parentEl = overlay.offsetParent;
    while (parentEl != null) {
        totaloffset = (offsettype == "left") ? totaloffset + parentEl.offsetLeft : totaloffset + parentEl.offsetTop;
        parentEl = parentEl.offsetParent;
    }
    return totaloffset;
}