var win1;
function popwin(strURL, strFeatures,  strWindowName) {
    if (strWindowName == null || strWindowName == '') {
        strWindowName = "HHChild"
    }
    if (strURL != null && strFeatures != null) {
        win1 = window.open(strURL, strWindowName, strFeatures);
        win1.focus();
    }
    else if (strURL != null && strFeatures != null) {
    win1 = window.open(strURL, strWindowName, strFeatures);
        win1.focus();
    }
    else if (strURL != null) {
    win1 = window.open(strURL, strWindowName, "toolbar=0,directories=0,location=0,status=1,menubar=0,resizeable=1,scrollbars=1");
        win1.focus();
    }
    else {
        window.alert("This function requires at least 1 parameter that is the site URL!!");
    }
}