/*-------------------------------------------------------------------------*/
// IPS BASIC MENU CLASS
// (c) 2005 Invision Power Services, Inc
// ASSUMES "ips_global.js" has been loaded
/*-------------------------------------------------------------------------*/

var menu_registered = new Array();
var menu_openfuncs  = new Array();
var menu_built      = new Array();
var menu_open_menus = new Array();
var menu_cur_open   = false;

/*-------------------------------------------------------------------------*/
// menu_do_global_init: Initiate all registered menus in HTML
/*-------------------------------------------------------------------------*/

function menu_do_global_init()
{
        if ( menu_registered.length > 0 )
        {
                for( var i in menu_registered )
                {
                        menu_init( menu_registered[i] );
                }

                //----------------------------------
                // Close all menus on click
                //----------------------------------

                document.onclick = menu_action_close;
        }
}

/*-------------------------------------------------------------------------*/
// menu_init: Initiate a single menu
/*-------------------------------------------------------------------------*/

function menu_init(cid)
{
        var mid  = _menu_get_base_name(cid) + "_menu";
        var mobj = my_getbyid(mid);

        if ( document.getElementsByTagName && mobj )
        {
                //----------------------------------
                // Control object (link / img, etc)
                //----------------------------------

                var cobj = my_getbyid(cid);

                // Change cursor to show link
                try
                {
                        cobj.style.cursor = "pointer";
                }
                catch(e)
                {
                        cobj.style.cursor = "hand";
                }

                cobj.unselectable = true;
                cobj.onclick      = _event_menu_click;
                cobj.onmouseover  = _event_menu_mouseover;

                //----------------------------------
                // Save CPU - already init?
                //----------------------------------

                if ( typeof( menu_built[mid]) != "undefined" )
                {
                        return;
                }

                //----------------------------------
                // Pop-up menu obj (hidden div)
                //----------------------------------

                var pobj = my_getbyid(mid);

                // Set up style defaults
                pobj.style.display  = "none";
                pobj.style.position = "absolute";
                pobj.style.left     = "0px";
                pobj.style.top      = "0px";
                pobj.onclick        = _cancel_bubble;
                pobj.zIndex         = 1000;

                menu_built[mid] = true;
        }
}

/*-------------------------------------------------------------------------*/
// Register menu control ID (add to array)
/*-------------------------------------------------------------------------*/

function menu_register(cid, callback)
{
        if ( document.getElementsByTagName )
        {
                var cobj = my_getbyid(cid);

                if (cobj)
                {
                        menu_registered[menu_registered.length] = cid;

                        if ( callback )
                        {
                                menu_openfuncs[ cobj ] = callback;
                        }

                        return true;
                }
        }

        return false;
}

/*-------------------------------------------------------------------------*/
// ACTION: If registered control ID clicked, open menu
/*-------------------------------------------------------------------------*/

function menu_action_open(e)
{
        var openmenu = menu_cur_open;
        var negpad   = true;

        //----------------------------------
        // Close current menu(s)
        //----------------------------------

        menu_action_close();

        //----------------------------------
        // Save CPU - cur open clicked?
        //----------------------------------

        if ( openmenu == e.id )
        {
                return false;
        }

        //----------------------------------
        // Get ID of menu DIV to show
        //----------------------------------

        var mid         = _menu_get_base_name(e.id) + "_menu";
        var mobj        = my_getbyid(mid);
        var left_px     = _get_obj_leftpos(e);
        var top_px      = _get_obj_toppos(e) + e.offsetHeight;
        var callbackobj = my_getbyid( e.id );
        var ifid        = e.id;

        menu_open_menus[e.id] = true;
        menu_cur_open         = e.id;

        //----------------------------------
        // Show menu DIV
        //----------------------------------

        mobj.style.display = "";

        //----------------------------------
        // Try and keep it on screen
        //----------------------------------

        var width = parseInt( mobj.style.width ) ? parseInt( mobj.style.width ) : mobj.offsetWidth;

        if ( (left_px + width) >= document.body.clientWidth )
        {
                left_px = left_px + e.offsetWidth - width;
                negpad  = false;
        }

        //----------------------------------
        // IE needs a tweak...
        //----------------------------------

        if ( is_ie )
        {
                left_px += ( negpad ) ? -2 : 2;
        }

        //----------------------------------
        // Finalize menu position
        //----------------------------------

        mobj.style.left   = left_px + "px";
        mobj.style.top    = top_px  + "px";
        mobj.style.zIndex = 100;

        //----------------------------------
        // Run a custom function?
        //----------------------------------

        if ( menu_openfuncs[ callbackobj ] )
        {
                eval( menu_openfuncs[ callbackobj ] );
        }

        //----------------------------------
        // Workaround for IE bug which shows
        // select boxes and other windows GUI
        // over divs. SHOW IFRAME
        //----------------------------------

        if ( is_ie )
        {
                try
                {
                        if ( ! document.getElementById( 'if_' + e.id ) )
                        {
                                var iframeobj = document.createElement('iframe');

                                iframeobj.src = 'javascript:;';
                                iframeobj.id  = 'if_' + e.id;

                                document.getElementsByTagName('body').appendChild( iframeobj );
                        }
                        else
                        {
                                var iframeobj = document.getElementById( 'if_' + e.id );
                        }

                        iframeobj.scrolling      = 'no';
                        iframeobj.frameborder    = 'no';
                        iframeobj.className      = 'iframeshim';
                        iframeobj.style.position = 'absolute';

                        iframeobj.style.width   = parseInt(mobj.offsetWidth)  + 'px';
                        iframeobj.style.height  = parseInt(mobj.offsetHeight) + 'px';
                        iframeobj.style.top     = mobj.style.top;
                        iframeobj.style.left    = mobj.style.left;
                        iframeobj.style.zIndex  = 99;
                        iframeobj.style.display = "block";

            }
            catch(e)
            {
                    //alert(e); // Oh dear, someones stolen the iframe
            }
        }

        //----------------------------------
        // Work around for safari which doesnt
        // allow a hrefs top be clickable in
        // a pop up div
        //----------------------------------

        if ( is_safari )
        {
                try
                {
                        mlinks = mobj.getElementsByTagName('a');

                        for ( var i = 0 ; i <= mlinks.length ; i++ )
                        {
                                //----------------------------------
                                // Ignore non links and links that end with #
                                // As safari likes to do that with href='#' links
                                //----------------------------------

                                if ( mlinks[i].href && ( mlinks[i].href.indexOf( '#', 0 ) != (mlinks[i].href.length - 1) ) )
                                {
                                        mlinks[i].onmousedown = _safari_onclick_handler;
                                        mlinks[i].id          = 'saf-link-' + mid + i;
                                }
                        }
                }
                catch( e )
                {
                        //alert( e );
                }
        }

        return false;
}

/*-------------------------------------------------------------------------*/
// Safari: bug fix
/*-------------------------------------------------------------------------*/

function _safari_onclick_handler()
{
        if ( this.id )
        {
                window.location = document.getElementById( this.id ).href;
        }
}


/*-------------------------------------------------------------------------*/
// ACTION: Close all open menus
/*-------------------------------------------------------------------------*/

function menu_action_close()
{
        if ( menu_cur_open )
        {
                for ( i in menu_open_menus )
                {
                        my_getbyid(_menu_get_base_name(i) + "_menu").style.display = "none";

                        //----------------------------------
                        // Workaround for IE bug which shows
                        // select boxes and other windows GUI
                        // over divs. Hide IFRAME
                        //----------------------------------

                        if ( is_ie )
                        {
                                try
                                {
                                        document.getElementById( 'if_' + i ).style.display = "none";
                                }
                                catch(e)
                                {
                                        //alert(e);// Oh dear, someones stolen the iframe
                                }
                        }

                        menu_open_menus[i] = false;
                }
        }

        menu_cur_open = false;
}

/*-------------------------------------------------------------------------*/
// ACTION: If menu open and hover over another cid, close cur open new
/*-------------------------------------------------------------------------*/

function menu_action_hover(e)
{
        for ( i in menu_open_menus )
        {
                if (menu_open_menus[i] == true && i != e.id)
                {
                        menu_action_open(e);
                        return;
                }
        }
}

/*-------------------------------------------------------------------------*/
// Prevent browser bubblin'
/*-------------------------------------------------------------------------*/

function _cancel_bubble(obj, extra)
{
        if ( ! obj || is_ie)
        {
                if ( extra )
                {
                        window.event.returnValue = false;
                }

                window.event.cancelBubble = true;

                return window.event;
        }
        else
        {
                if (obj.target.type == 'submit')
                {
                        obj.target.form.submit();
                }

                obj.stopPropagation();

                if ( extra )
                {
                        obj.preventDefault();
                }

                return obj;
        }
}

/*-------------------------------------------------------------------------*/
// EVENT : Mouse over menu
/*-------------------------------------------------------------------------*/

function _event_menu_mouseover(e)
{
        e = _cancel_bubble(e, true);
        menu_action_hover(this);
}

/*-------------------------------------------------------------------------*/
// EVENT: Menu click
/*-------------------------------------------------------------------------*/

function _event_menu_click(e)
{
        e = _cancel_bubble(e, true);
        menu_action_open(this);
}

/*-------------------------------------------------------------------------*/
// Get menu basename
/*-------------------------------------------------------------------------*/

function _menu_get_base_name(cid)
{
        var endpos = cid.indexOf(".");

        if (endpos != -1)
        {
                return cid.substr(0, endpos);
        }
        else
        {
                return cid;
        }
}

/*-------------------------------------------------------------------------*/
// Get left posititon of object
/*-------------------------------------------------------------------------*/

function _get_obj_leftpos(obj)
{
        var left = obj.offsetLeft;

        while( (obj = obj.offsetParent) != null )
        {
                left += obj.offsetLeft;
        }

        return left;
}

/*-------------------------------------------------------------------------*/
// Get top position of object
/*-------------------------------------------------------------------------*/

function _get_obj_toppos(obj)
{
        var top = obj.offsetTop;

        while( (obj = obj.offsetParent) != null )
        {
                top += obj.offsetTop;
        }

        return top;
}