/*
        BEGIN MODAL DIALOG CODE 
*/
// Global for brower version branching.
var Nav4 = ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) == 4))

// One object tracks the current modal dialog opened from this window.
var dialogWin = new Object()

// Generate a modal dialog.
// Parameters:
//    url -- URL of the page/frameset to be loaded into dialog
//    width -- pixel width of the dialog window
//    height -- pixel height of the dialog window
//    returnFunc -- reference to the function (on this page)
//                  that is to act on the data returned from the dialog
//    args -- [optional] any data you need to pass to the dialog

function openDialog(url,winName,width, height, returnFunc, args) {
        if (!dialogWin.win || (dialogWin.win && dialogWin.win.closed)) {
                // Initialize properties of the modal dialog object.
                dialogWin.returnFunc = returnFunc
                dialogWin.returnedValue = ""
                dialogWin.args = args
                dialogWin.url = url
                dialogWin.width = width
                dialogWin.height = height

                // Keep name unique so Navigator doesn't overwrite an existing dialog.
                dialogWin.name = winName

                // Assemble window attributes and try to center the dialog.
                if (Nav4) {
                        // Center on the main window.
                        dialogWin.left = window.screenX + ((window.outerWidth - dialogWin.width) / 2);
                        dialogWin.top = window.screenY + ((window.outerHeight - dialogWin.height) / 2);
                        var attr = "screenX=" + dialogWin.left + ",screenY=" + dialogWin.top + ",resizable=no,width=" + dialogWin.width + ",height=" + dialogWin.height;
                } else {
                        // The best we can do is center in screen.
                        dialogWin.left = (screen.width - dialogWin.width) / 2;
                        dialogWin.top = (screen.height - dialogWin.height) / 2;
                        var attr = "left=" + dialogWin.left + ",top=" + dialogWin.top + ",resizable=no,width=" + dialogWin.width + ",height=" + dialogWin.height;
                }

                // Generate the dialog and make sure it has focus.
                dialogWin.win=window.open(dialogWin.url, dialogWin.name, attr);
                dialogWin.win.focus()
        } else {
                dialogWin.win.focus();
        }
}

// Event handler to inhibit Navigator form element 
// and IE link activity when dialog window is active.
function deadend() {
        if (dialogWin.win && !dialogWin.win.closed) {
                dialogWin.win.focus();
                return false;
        }
}

// Since links in IE4 cannot be disabled, preserve 
// IE link onclick event handlers while they're "disabled."
// Restore when re-enabling the main window.
var IELinkClicks;

// Disable form elements and links in all frames for IE.
function disableForms() {
        IELinkClicks = new Array()
        for (var h = 0; h < frames.length; h++) {
                for (var i = 0; i < frames[h].document.forms.length; i++) {
                        for (var j = 0; j < frames[h].document.forms[i].elements.length; j++) {
                                frames[h].document.forms[i].elements[j].disabled = true;
                        }
                }
                IELinkClicks[h] = new Array();
                for (i = 0; i < frames[h].document.links.length; i++) {
                        IELinkClicks[h][i] = frames[h].document.links[i].onclick;
                        frames[h].document.links[i].onclick = deadend;
                }
        }
}

// Restore IE form elements and links to normal behavior.
function enableForms() {
        for (var h = 0; h < frames.length; h++) {
                for (var i = 0; i < frames[h].document.forms.length; i++) {
                        for (var j = 0; j < frames[h].document.forms[i].elements.length; j++) {
                                frames[h].document.forms[i].elements[j].disabled = false;
                        }
                }
                for (i = 0; i < frames[h].document.links.length; i++) {
                        frames[h].document.links[i].onclick = IELinkClicks[h][i];
                }
        }
}

// Grab all Navigator events that might get through to form
// elements while dialog is open. For IE, disable form elements.
function blockEvents() {
        if (Nav4) {
                window.captureEvents(Event.CLICK | Event.MOUSEDOWN | Event.MOUSEUP | Event.FOCUS);
                window.onclick = deadend;
                window.onfocus = checkModal;
        } else {
                disableForms();
        }
}

// As dialog closes, restore the main window's original
// event mechanisms.
function unblockEvents() {
        if (Nav4) {
                window.releaseEvents(Event.CLICK | Event.MOUSEDOWN | Event.MOUSEUP | Event.FOCUS);
                window.onclick = null;
                window.onfocus = null;
        } else {
                enableForms();
        }
}

// Invoked by onFocus event handler of EVERY frame,
// return focus to dialog window if it's open.
function checkModal() {
        if (dialogWin.win && !dialogWin.win.closed) {
                dialogWin.win.focus();
        }
}
/*
        END MODAL DIALOG CODE
*/