$(document).ready(function()
	{

		var parent_element	= '#parent';	// identifier of parent element
		var item_element	= '#items';		// identifier of items element
		var post_file		= 'post.php';	// Post Handler

		var wait_note 	= '<option>Loading...</option>'; // wait message
		var zero_note	= "Sorry, No items match the options";	// no item message

		// parent element onchange handler
		$(parent_element).change(function(){
			var parent = new Array();$(parent_element+" option:selected").each(function(){parent.push($(this).val());});
			if (parent == 4) {
				window.parent.location.href = "http://amdi.net/store/";
			}
			
			if (parent == 5) {
				window.parent.location.href = "http://amdi.net/downloads/";
			}
			load_items(parent.toString());
		});

		// load at the first time
		//load_parent();
		load_items(0);

		// load items based on selected parent
		function load_items(parent)
			{
				$(item_element).html(wait_note);
				$.post(post_file, { a: 'item', p: parent },
					function(data)
						{
							var opt = "";
							if(data.length)
							{
								opt += '<option></option>';
								for(i=0;i<data.length;i++) {
									var style = ' style="background-color:'+((i % 2 ==0)?'#f4f4f4':'#fff')+';color:'+((i % 2 ==0)?'#555':'#999')+'"';
									opt += '<option value="' + data[i].code + '"'+style+'>' + data[i].name + '</option>';
								}
							}
							else
							{
								opt ='<option value="">'+zero_note+'</option>';
							}
							$(item_element).html(opt);
						}
					,'json');
			}


	});