/*
* AccordionMenu - mootools accordion menu
*
* Usage: From "Joomla admin panel >> Module Manager >> under Module Advanced Parameters" assign a "Menu Tag ID" for your menu. Under "Module Parameters" set "Always show sub-menu Items" to "yes"
*
* Use the previous id as first argument for function accordionMenu()
*
* Example:
*
* insert following code in the head section of the template index.php
*
<script type="text/javascript">
window.addEvent('domready', function(){
accordionMenu(
   "mainmenu", // Menu Tag ID (this id is assigned to menu parent ul tag)
   "<?php echo $this->baseurl ?>/templates/<?php echo $this->template?>/images/expand.png", //path to image used to expand menu item
   "<?php echo $this->baseurl ?>/templates/<?php echo $this->template?>/images/collapse.png", //path to image used to collapse menu item
   {duration:400, transition:Fx.Transitions.Quart.easeOut}, // (optional argument) custom accordion options to override defaults, use null if you want to set next argument without changing this
   700 // (optional argument) hover delay in milliseconds over "parent menu item" to open its sublevels, default is 500
);

accordionMenu(
   "resources"
   "<?php echo $this->baseurl ?>/templates/<?php echo $this->template?>/images/expand.png",
   "<?php echo $this->baseurl ?>/templates/<?php echo $this->template?>/images/collapse.png"
);

accordionMenu(
   "keyconcepts"
   "<?php echo $this->baseurl ?>/templates/<?php echo $this->template?>/images/expand.png",
   "<?php echo $this->baseurl ?>/templates/<?php echo $this->template?>/images/collapse.png",
   null,
   1000
);

});
</script>
*
* Use CSS to style menu items for different levels
*
* v1.0 - by ah72, July 2008
*
*/


function accordionMenu(menuId, srcExpandImage, srcCollapseImage, accOptions, accHoverDelay) {
if($(menuId)){

    // getting accordion parent items ("li" tags with class "parent")
    $(menuId).accParentItems = [];

    for(var i = 0; i < $(menuId).childNodes.length; i++) {

        if($(menuId).childNodes[i].className.indexOf('parent') >= 0){
            $(menuId).accParentItems.push($(menuId).childNodes[i]);
        }
    }


    $(menuId).accTogglers = [];
    $(menuId).accElements = [];
    var startItem = -1;

    for(var i = 0; i < $(menuId).accParentItems.length; i++) {
		
        // creating accordion togglers
        var accToggler = document.createElement("img");

        accToggler.setAttribute("title","Expand");
        accToggler.setAttribute("src",srcExpandImage);
		
		var elem = $E('a span', $(menuId).accParentItems[i]);
						
        //accToggler.injectTop(aLink);
		elem.parentNode.insertBefore(accToggler, elem);
		//$(menuId).accParentItems[i].insertBefore(accToggler, $(menuId).accParentItems[i].firstChild);

        $(menuId).accTogglers.push(accToggler);

        // accordion elements
        $(menuId).accElements.push($(menuId).accParentItems[i].getElementsByTagName('ul')[0]);

        // searching for active menu item to make the accordion show its sub-items when page loads
        if ( $(menuId).accParentItems[i].className.indexOf('active') >= 0 ) {
            startItem = i;
        }
   }

    //create our Accordion instance
    if ( $(menuId).accParentItems.length > 0 ){
        $(menuId).Accordion = new Accordion($(menuId).accTogglers, $(menuId).accElements, $merge({
            opacity: false,
            alwaysHide: true,
            show: startItem,
            duration: 600,
            transition: Fx.Transitions.Bounce.easeOut,

            onActive: function(toggler, element){
                element.parentNode.parentNode.setStyle('height', 'auto');
                toggler.setAttribute("src", srcCollapseImage);
                toggler.setAttribute("title","Collapse");
            },
            onBackground: function(toggler, element){
                element.parentNode.parentNode.setStyle('height', 'auto');
                element.setStyle('height', element.offsetHeight+'px');
                toggler.setAttribute("src", srcExpandImage);
                toggler.setAttribute("title","Expand");
            }

            }, accOptions)

        );
    }

    accTimer = null;
    if (!accHoverDelay) var accHoverDelay = 500;

    for(var i = 0; i < $(menuId).accParentItems.length; i++) {

        eval("function accOnclickFunc(){return function(){ if( $('"+menuId+"').accElements["+i+"].style.height == '0px' ) { $('"+menuId+"').Accordion.display("+i+") }}}");
        eval("function accOnMouseoverFunc(){return function(){if( $('"+menuId+"').accElements["+i+"].style.height == '0px' ){accTimer = $('"+menuId+"').Accordion.display.delay("+accHoverDelay+", $('"+menuId+"').Accordion, "+i+");}}}");
        eval("function accOnmouseoutFunc(){return function(){if($defined(accTimer)){$clear(accTimer);}}}");

        $(menuId).accParentItems[i].firstChild.nextSibling.onclick = accOnclickFunc();
        $(menuId).accParentItems[i].firstChild.onmouseover = accOnMouseoverFunc();
        $(menuId).accParentItems[i].firstChild.onmouseout = accOnmouseoutFunc();
    }


    for(var i = 0; i < $(menuId).accElements.length; i++) {
        $(menuId).accElements[i].setAttribute('id', menuId+'_'+i);
        accordionMenu(menuId+'_'+i, srcExpandImage, srcCollapseImage, accOptions, accHoverDelay)
    }

}
}