/**
     * Simple function to refresh a page.
     */
    function tiendaUpdate()
    {
        location.reload(true);
    }
    
    /**
     * Resets the filters in a form.
     * This should be renamed to tiendaResetFormFilters
     * 
     * @param form
     * @return
     */
    function tiendaFormReset(form)
    {
        // loop through form elements
        var str = new Array();
        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 tiendaGridOrdering( order, dir ) 
	{
		var form = document.adminForm;
	     
		form.filter_order.value     = order;
		form.filter_direction.value	= dir;
	
		form.submit();
	}
	
	/**
	 * 
	 * @param id
	 * @param change
	 * @return
	 */
	function tiendaGridOrder(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 tiendaFormValidation( url, container, task, form ) 
    {
        if (task == 'save' || task == 'apply' || task == 'savenew' || task == 'preparePayment' || task == 'review' || task == 'selectpayment' || task == 'addtocart' ) 
        {
            // 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); }
                    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 tiendaSubmitForm(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 tiendaDisplayDiv (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 tiendaSwitchDisplayDiv( 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 tiendaShowHideDiv(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 tiendaDoTask( url, container, form, msg, doModal ) 
	{
		if (doModal != false) { tiendaNewModal(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)) { $(container).setHTML(resp.msg); }
                    if (doModal != false) { (function() { document.body.removeChild($('tiendaModal')); }).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)) { $(container).setHTML(resp.msg); }
                    if (doModal != false) { (function() { document.body.removeChild($('tiendaModal')); }).delay(500); }
                    return true;
            }
            }).request();			
		}
	}

	/**
	 * 
	 * @param {String} msg message for the modal div (optional)
	 */
	function tiendaNewModal (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_tienda/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 = 'tiendaModal';
		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 tiendaGetCheckedValue(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 "";
	}
	
	function tiendaVerifyZone()
	{
		var c = document.getElementById('country_id');
		var z = document.getElementById('zone_id');
		
		if (c != null && c != 'undefined' && c != '' && z != null && z != 'undefined' && z != '') {
			if (z.options[z.selectedIndex].value != "" && c.options[c.selectedIndex].value != "") {
				document.getElementById('task').value='addzone';
				document.adminForm.submit();
			} else {
				alert('Please select both a Country and a Zone.');
			}
		} else {
			alert('Please select both a Country and a Zone.');
		}
	}
	
	
	function submitTiendabutton(pressbutton, fieldname) {
		submitTiendaform(pressbutton, fieldname );
	}

	
	/**
	* Submit the admin form using a custom task field name
	*/
	function submitTiendaform(pressbutton, fieldname){
		if (pressbutton) {
			document.adminForm.elements[fieldname].value=pressbutton;
		}
		if (typeof document.adminForm.onsubmit == "function") {
			document.adminForm.onsubmit();
		}
		document.adminForm.submit();
	}

	/**
	 * Pauses execution for the specified milliseconds
	 * @param milliseconds
	 * @return
	 */
	function tiendaPause(milliseconds) 
	{
	    var dt = new Date();
	    while ((new Date()) - dt <= milliseconds) { /* Do nothing */ }
	}
	
    /**
     * 
     * @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 tiendaAddToCart( url, container, form, msg ) 
    {
        var cartContainer = 'tiendaUserShoppingCart';
        var cartUrl = 'index.php?option=com_tienda&format=raw&view=carts&task=displayCart';

        // 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 (resp.error == '1') 
                {
                    if ($(container)) { $(container).setHTML(resp.msg); }
                    return false;
                }
                    else
                {
                    tiendaPause(500);
                    tiendaDoTask( cartUrl, cartContainer, '', '', false );
                    return true;
                }
            }
        }).request();
    }
    
    function tiendaUpdateAddToCart( container, form )
    {
        var url = 'index.php?option=com_tienda&format=raw&view=products&task=updateAddToCart';
        
        // 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); }
                return true;
            }
        }).request();
    }