jquery.fn.extend({
	selectbox: function(options) {
		return this.each(function() {
			new jquery.selectbox(this, options);
		});
	}
});


/* pawel maziarz: work around for ie logging */
if (!window.console) {
	var console = {
		log: function(msg) { 
	 }
	}
}
/* */

jquery.selectbox = function(selectobj, options) {
	
	var opt = options || {};
	opt.inputclass = opt.inputclass || "selectbox";
	opt.containerclass = opt.containerclass || "selectbox-wrapper";
	opt.hoverclass = opt.hoverclass || "current";
	opt.currentclass = opt.selectedclass || "selected"
	opt.debug = opt.debug || false;
	
	var elm_id = selectobj.id;
	var active = 0;
	var infocus = false;
	var hasfocus = 0;
	//jquery object for select element
	var $select = $(selectobj);
	// jquery container object
	var $container = setupcontainer(opt);
	//jquery input object 
	var $input = setupinput(opt);
	// hide select and append newly created elements
	$select.hide().before($input).before($container);
	
	
	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 9:  // tab 
			case 13: // return
				event.preventdefault(); // seems not working in mac !
				$('li.'+opt.hoverclass).trigger('click');
				break;
			case 27: //escape
			  hideme();
			  break;
		}
	})
	.blur(function() {
		if ($container.is(':visible') && hasfocus > 0 ) {
			if(opt.debug) console.log('container visible and has focus')
		} else {
		  // workaround for ie scroll - thanks to bernd matzner
		  if($.browser.msie || $.browser.safari){ // check for safari too - workaround for webkit
        if(document.activeelement.getattribute('id').indexof('_container')==-1){
          hideme();
        } else {
          $input.focus();
        }
      } else {
        hideme();
      }
		}
	});


	function hideme() { 
		hasfocus = 0;
		$container.hide(); 
	}
	
	function init() {
		$container.append(getselectoptions($input.attr('id'))).hide();
		var width = $input.css('width');

    }
	
	function setupcontainer(options) {
		var container = document.createelement("div");
		$container = $(container);
		$container.attr('id', elm_id+'_container');
		$container.addclass(options.containerclass);
		
		return $container;
	}
	
	function setupinput(options) {
		var input = document.createelement("input");
		var $input = $(input);
		$input.attr("id", elm_id+"_input");
		$input.attr("type", "text");
		$input.addclass(options.inputclass);
		$input.attr("autocomplete", "off");
		$input.attr("readonly", "readonly");
		$input.attr("tabindex", $select.attr("tabindex")); // "i" capital is important for ie
		
		return $input;	
	}
	
	function moveselect(step) {
		var lis = $("li", $container);
		if (!lis || lis.length == 0) return false;
		active += step;
    //loop through list
		if (active < 0) {
			active = lis.size();
		} else if (active > lis.size()) {
			active = 0;
		}
    scroll(lis, active);
		lis.removeclass(opt.hoverclass);

		$(lis[active]).addclass(opt.hoverclass);
	}
	
	function scroll(list, active) {
      var el = $(list[active]).get(0);
      var list = $container.get(0);
      
      if (el.offsettop + el.offsetheight > list.scrolltop + list.clientheight) {
        list.scrolltop = el.offsettop + el.offsetheight - list.clientheight;      
      } else if(el.offsettop < list.scrolltop) {
        list.scrolltop = el.offsettop;
      }
	}
	
	function setcurrent() {	
		var li = $("li."+opt.currentclass, $container).get(0);
		var ar = (''+li.id).split('_');
		var el = ar[ar.length-1];
		$select.val(el);
		$input.val($(li).html());
		return true;
	}
	
	// select value
	function getcurrentselected() {
		return $select.val();
	}
	
	// input value
	function getcurrentvalue() {
		return $input.val();
	}
	
	function getselectoptions(parentid) {
		var select_options = new array();
		var ul = document.createelement('ul');
		$select.children('option').each(function() {
			var li = document.createelement('li');
			li.setattribute('id', parentid + '_' + $(this).val());
			li.innerhtml = $(this).html();
			if ($(this).is(':selected')) {
				$input.val($(this).html());
				$(li).addclass(opt.currentclass);
			}
			ul.appendchild(li);
			$(li)
			.mouseover(function(event) {
				hasfocus = 1;
				if (opt.debug) console.log('over on : '+this.id);
				jquery(event.target, $container).addclass(opt.hoverclass);
			})
			.mouseout(function(event) {
				hasfocus = -1;
				if (opt.debug) console.log('out on : '+this.id);
				jquery(event.target, $container).removeclass(opt.hoverclass);
			})
			.click(function(event) {
			  var fl = $('li.'+opt.hoverclass, $container).get(0);
				if (opt.debug) console.log('click on :'+this.id);
				$('#' + elm_id + '_container' + ' li.'+opt.currentclass).removeclass(opt.currentclass); 
				$(this).addclass(opt.currentclass);
				setcurrent();
				//$select.change();
				$select.get(0).blur();
				hideme();
			});
		});
		return ul;
	}
	
	
	
};