/**
     * Simple function to refresh a page.
     */
    function amigosUpdate()
    {
        location.reload(true);
    }
    
    /**
     * Resets the filters in a form.
     * This should be renamed to amigosResetFormFilters
     * 
     * @param form
     * @return
     */
    function amigosFormReset(form)
    {
        // loop through form elements
        for(i=0; i<form.elements.length; i++)
        {
            var string = form.elements[i].name;
            if (string && string.substring(0,6) == 'filter')
            {
                form.elements[i].value = '';
            }
        }
        form.submit();
    }
    
    /**
     * 
     * @param {Object} order
     * @param {Object} dir
     * @param {Object} task
     */
    function amigosGridOrdering( order, dir ) 
    {
        var form = document.adminForm;
         
        form.filter_order.value     = order;
        form.filter_direction.value = dir;
    
        form.submit();
    }
    
    /**
     * 
     * @param id
     * @param change
     * @return
     */
    function amigosGridOrder(id, change) 
    {
        var form = document.adminForm;
        
        form.id.value= id;
        form.order_change.value = change;
        form.task.value = 'order';
        
        form.submit();
    }
    
    /**
     * Sends form values to server for validation and outputs message returned.
     * Submits form if error flag is not set in response
     * 
     * @param {String} url for performing validation
     * @param {String} form element name
     * @param {String} task being performed
     */
    function amigosFormValidation( url, container, task, form ) 
    {
        if (task == 'save' || task == 'apply' || task == 'savenew' || task == 'preparePayment') 
        {
            // loop through form elements and prepare an array of objects for passing to server
            var str = new Array();
            for(i=0; i<form.elements.length; i++)
            {
                postvar = {
                    name : form.elements[i].name,
                    value : form.elements[i].value,
                    checked : form.elements[i].checked,
                    id : form.elements[i].id
                };
                str[i] = postvar;
            }
            
            // execute Ajax request to server
            var a=new Ajax(url,{
                method:"post",
                data:{"elements":Json.toString(str)},
                onComplete: function(response){
                    var resp=Json.evaluate(response, false);
                    $(container).setHTML(resp.msg);
                    if (resp.error != '1') 
                    {
                        form.task.value = task;
                        form.submit();
                    }
                }
            }).request();
        }
            else 
        {
            form.task.value = task;
            form.submit();
        }
    }
    
    /**
     * Submits form using onsubmit if present
     * @param task
     * @return
     */
    function amigosSubmitForm(task)
    {
        document.adminForm.task.value = task;

        if (typeof document.adminForm.onsubmit == "function") 
        {
            document.adminForm.onsubmit();
        }
            else
        {
            document.adminForm.submit();
        }
    }
    
    /**
     * Overriding core submitbutton task to perform our onsubmit function
     * without submitting form afterwards
     * 
     * @param task
     * @return
     */
    function submitbutton(task) 
    {
        if (task) 
        {
            document.adminForm.task.value = task;
        }

        if (typeof document.adminForm.onsubmit == "function") 
        {
            document.adminForm.onsubmit();
        }
            else
        {
            submitform(task);
        }
    }
    
    /**
     * 
     * @param {Object} divname
     * @param {Object} spanname
     * @param {Object} showtext
     * @param {Object} hidetext
     */
    function amigosDisplayDiv (divname, spanname, showtext, hidetext) { 
        var div = document.getElementById(divname);
        var span = document.getElementById(spanname);
    
        if (div.style.display == "none")    {
            div.style.display = "";
            span.innerHTML = hidetext;
        } else {
            div.style.display = "none";
            span.innerHTML = showtext;
        }
    }
    
    /**
     * 
     * @param {Object} prefix
     * @param {Object} newSuffix
     */
    function amigosSwitchDisplayDiv( prefix, newSuffix )
    {
        var newName = prefix + newSuffix;
        var currentSuffixDiv = document.getElementById('currentSuffix');
        var currentSuffix = currentSuffixDiv.innerHTML; 
        var oldName = prefix + currentSuffix;
        var newDiv = document.getElementById(newName);
        var oldDiv = document.getElementById(oldName);
    
        currentSuffixDiv.innerHTML = newSuffix;
        newDiv.style.display = "";
        oldDiv.style.display = "none";
    }
    
    function amigosShowHideDiv(divname)
    {
        var divObject = document.getElementById(divname);
        if (divObject == null){return;}
        if (divObject.style.display == "none"){
            divObject.style.display = "";
        }
        else{
            divObject.style.display = "none";
        }
    }

    /**
     * 
     * @param {String} url to query
     * @param {String} document element to update after execution
     * @param {String} form name (optional)
     * @param {String} msg message for the modal div (optional)
     */
    function amigosDoTask( url, container, form, msg ) 
    {
        amigosNewModal(msg);
        
        // if url is present, do validation
        if (url && form) 
        {   
            // loop through form elements and prepare an array of objects for passing to server
            var str = new Array();
            for(i=0; i<form.elements.length; i++)
            {
                postvar = {
                    name : form.elements[i].name,
                    value : form.elements[i].value,
                    checked : form.elements[i].checked,
                    id : form.elements[i].id
                };
                str[i] = postvar;
            }
            // execute Ajax request to server
            var a=new Ajax(url,{
                method:"post",
                data:{"elements":Json.toString(str)},
                onComplete: function(response){
                    var resp=Json.evaluate(response, false);
                    if ($(container)) { $(container).setHTML(resp.msg); }
                    (function() { document.body.removeChild($('amigosModal')); }).delay(500);
                    return true;
                }
            }).request();
        }
            else if (url && !form) 
        {
            // execute Ajax request to server
            var a=new Ajax(url,{
                method:"post",
                onComplete: function(response){
                    var resp=Json.evaluate(response, false);
                    if ($(container)) { $(container).setHTML(resp.msg); }
                    (function() { document.body.removeChild($('amigosModal')); }).delay(500);
            }
            }).request();           
        }
    }

    /**
     * 
     * @param {String} msg message for the modal div (optional)
     */
    function amigosNewModal (msg)
    {
        if (typeof window.innerWidth != 'undefined') {
            var h = window.innerHeight;
            var w = window.innerWidth;
        } else {
            var h = document.documentElement.clientHeight;
            var w = document.documentElement.clientWidth;
        }
        var t = (h / 2) - 15;
        var l = (w / 2) - 15;
        var i = document.createElement('img');
        var s = window.location.toString();
        var src = 'media/com_amigos/images/ajax-loader.gif';
        i.src = (s.match(/administrator\/index.php/)) ? '../' + src : src;
        i.style.position = 'absolute';
        i.style.top = t + 'px';
        i.style.left = l + 'px';
        i.style.backgroundColor = '#000000';
        i.style.zIndex = '100001';
        var d = document.createElement('div');
        d.id = 'amigosModal';
        d.style.position = 'fixed';
        d.style.top = '0px';
        d.style.left = '0px';
        d.style.width = w + 'px';
        d.style.height = h + 'px';
        d.style.backgroundColor = '#000000';
        d.style.opacity = 0.5;
        d.style.filter = 'alpha(opacity=50)';
        d.style.zIndex = '100000';
        d.appendChild(i);
        if (msg != '' && msg != null) {
            var m = document.createElement('div');
            m.style.position = 'absolute';
            m.style.width = '200px';
            m.style.top = t + 50 + 'px';
            m.style.left = (w / 2) - 100 + 'px';
            m.style.textAlign = 'center';
            m.style.zIndex = '100002';
            m.style.fontSize = '1.2em';
            m.style.color = '#ffffff';
            m.innerHTML = msg;
            d.appendChild(m);
        }
        document.body.appendChild(d);
    }

    
    /**
     * Gets the value of a selected radiolist item
     * 
     * @param radioObj
     * @return string
     */
    function amigosGetCheckedValue(radioObj) 
    {
        if (!radioObj) { return ""; }
        
        var radioLength = radioObj.length;
        if (radioLength == undefined)
        {
            if(radioObj.checked)
                return radioObj.value;
            else
                return "";
        }
        
        for (var i = 0; i < radioLength; i++) 
        {
            if(radioObj[i].checked) {
                return radioObj[i].value;
            }
        }
        return "";
    }