function submit_form (action, hidden) {
    if (hidden == '') {  
	document.mainform.ht_action.value = action;
    }else{
	hidden.value = action;
    }
    document.mainform.submit();
}

function popup_window (url, name, w, h) {
    var x = 0;
    var y = 0;
    var params = "toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=no," + "left=" + x + ",top=" + y + ",width=" + w + ",height=" + h;
    newWindow = window.open(url, name, params);
}