(function($) {
	jQuery.TTcombo = function() {
		var input = jQuery(':input.TTcombo');
		jQuery.each(input, function() {
			new jQuery.SelectBox(this);
		});
	};
})(jQuery);

jQuery.SelectBox = function(selectobj) {

	var opt = {};
	opt.inputClass     =   "combo_default_item";
	opt.mainClass      =   "combo_wrap";
	opt.containerClass =   "combo_open_list";
	opt.hoverClass     =   "current";
	opt.currentClass   =   "selected";

	var elm_id     =   selectobj.id;
	var elm_name   =   selectobj.name;
	var elm_value  =   selectobj.value;
	var elm_change =   selectobj.title;
	var active     =   -1;
	var inFocus    =   false;
	var hasfocus   =   0;
	var wl = 0;

	var $select    =   jQuery(selectobj);
	var $main      =   setupMain(opt);
	var $container =   setupContainer(opt);
	var $input     =   setupInput(opt);

	$main.find('div.combo_custom').append($input).append($container);
	$select.before($main).remove();

	init();

	$input
	.click(function(){
	    if (!inFocus) { $container.toggle(); }
	})
	.focus(function(){
	   if ($container.not(':visible')) {
	       inFocus = true;
	       $container.show();
	   }
	})
	.keydown(function(event) {
		switch(event.keyCode) {
			case 38: // up
				event.preventDefault();
				moveSelect(-1);
				break;
			case 40: // down
				event.preventDefault();
				moveSelect(1);
				break;
			case 13: // return
				event.preventDefault();
				break;
			case 27: //escape
			  hideMe();
			  break;
		}
	})
	.blur(function() {
		if ($container.is(':visible') && hasfocus > 0 ) {
		} else { hideMe(); }
	});


	function hideMe() {
		hasfocus = 0;
		$container.hide();
	}

	function init() {
		$container.hide().find('div.combo_open_mid').append(getSelectOptions($input.attr('id')));
		var width = (wl*7)+15;
        width = (width<150) ? 150 : width;
		$main.width(width);
		$container.width(width);
		$container.css({'z-index':'1'});
		var elm = '<input type="hidden" id="'+elm_id+'" name="'+elm_name+'" value="'+elm_value+'" onchange="'+elm_change+'"/>';
		$input.after(elm);
	}

	function setupMain(opts) {
		var main = document.createElement("div");
		$main = jQuery(main);
		$main.attr('id', elm_id+'_container');
		$main.addClass(opts.mainClass);
		var div = '<div class="combo_custom_l"><div class="combo_custom"><div class="combo_custom_r"></div></div></div>';
		$main.append(div);
		return $main;
	}

	function setupContainer(opts) {
		var container = document.createElement("div");
		$container = jQuery(container);
		$container.addClass(opts.containerClass);
		var div = '<div class="combo_open_mid"></div>';
		$container.append(div);
		return $container;
	}

	function setupInput(opts) {
		var input = document.createElement("input");
		var $input = jQuery(input);
		$input.attr("id", elm_id+"_input");
		$input.attr("type", "text");
		$input.addClass(opts.inputClass);
		$input.attr("autocomplete", "off");
		$input.attr("readonly", "readonly");
		return $input;
	}

	function moveSelect(step) {
		var lis = jQuery("li", $container);
		if (!lis) return;
		active += step;
		if (active < 0) { active = 0; }
		else if (active >= lis.size()) { active = lis.size() - 1; }
		lis.removeClass(opt.hoverClass);
		jQuery(lis[active]).addClass(opt.hoverClass);
	}

	function setCurrent() {
		var li = jQuery("li."+opt.currentClass, $container).get(0);
		var ar = (''+li.id).split('_');
		var el = ar[ar.length-1];
		$input.val(jQuery(li).html());
		$input.next().val(el);
		return true;
	}

	// select value
	function getCurrentSelected() {	return $select.val(); }

	// input value
	function getCurrentValue() { return $input.val(); }

	function getSelectOptions(parentid) {
		var ul = document.createElement('ul');
		jQuery(ul).addClass('combo_list_item');
		$select.children('option').each(function() {
			var str = jQuery.trim(jQuery(this).html());
			var len = str.length;
			if(len > wl) { wl = len; }
			var li = document.createElement('li');
			li.setAttribute('id', parentid + '_' + jQuery(this).attr('id'));
			li.innerHTML = str;
			if (jQuery(this).is(':selected')) {
				$input.val(str);
				$input.next().val(jQuery(this).val());
				jQuery(li).addClass(opt.currentClass);
			}
			ul.appendChild(li);
			jQuery(li)
			.mouseover(function(event) {
				hasfocus = 1;
				jQuery(event.target, $container).addClass(opt.hoverClass);
			})
			.mouseout(function(event) {
				hasfocus = -1;
				jQuery(event.target, $container).removeClass(opt.hoverClass);
			})
			.click(function(event) {
				jQuery(this).parent().children('li').each(function() { jQuery(this).removeClass(opt.currentClass); });
				jQuery(this).addClass(opt.currentClass);
				setCurrent();
				hideMe();
				$input.next().trigger('click');
				if(elm_change != null)
				    $input.next().trigger('change');
			});
		});
		return ul;
	}

};