// JavaScript Document
/* idTabs ~ Sean Catchpole - Version 1.0 */

/* Options (in any order):

start (number|string)
    Index number of default tab. ex: idTabs(0)
    String of id of default tab. ex: idTabs("#tab1")
    default: class "selected" or index 0

return (boolean)
    True - Url will change. ex: idTabs(true)
    False - Url will not change. ex: idTabs(false)
    default: false

click (function)
    Function will be called when a tab is clicked. ex: idTabs(foo)
    If the function returns true, idTabs will show/hide content (as usual).
    If the function returns false, idTabs will not take any action.
    The function is passed three variables:
      The id of the element to be shown
      an array of all id's that can be shown
      and the element containing the tabs
*/
(function($gx){
  $gx.fn.idTabs = function(){
    //Defaults
    var s = { "start":null,
              "return":false,
              "click":null };

    //Loop Arguments matching options
    for(var i=0; i<arguments.length; ++i) {
      var n = {}, a=arguments[i];
      switch(typeof a){
        case "object": $gx.extend(n,a); break;
        case "number":
        case "string": n.start = a; break;
        case "boolean": n["return"] = a; break;
        case "function": n.click = a; break;
      }; $gx.extend(s,n);
    }
     
    //Setup Tabs
    var self = this; //Save scope
    var list = $gx("a[@href^='#']",this).click(function(){
      if($gx("a.selected",self)[0]==this)
        return s["return"]; //return if already selected
      var id = "#"+this.href.split('#')[1];
      var aList = []; //save tabs
      var idList = []; //save possible elements
      $gx("a",self).each(function(){
        if(this.href.match(/#/)) {
          aList[aList.length]=this;
          idList[idList.length]="#"+this.href.split('#')[1];
        }
      });
      if(s.click && !s.click(id,idList,self)) return s["return"];
      //Clear tabs, and hide all
      for(i in aList) $gx(aList[i]).removeClass("selected");
      for(i in idList) $gx(idList[i]).hide();
      //Select clicked tab and show content
      $gx(this).addClass("selected");
      $gx(id).show();
      return s["return"]; //Option for changing url
    });

    //Select default tab
    var test;
    if(typeof s.start == "number" && (test=list.filter(":eq("+s.start+")")).length)
      test.click(); //Select num tab
    else if(typeof s.start == "string" && (test=list.filter("[@href='#"+s.start+"']")).length)
      test.click(); //Select tab linking to id
    else if((test=list.filter(".selected")).length)
      test.removeClass("selected").click(); //Select tab with class 'selected'
    else list.filter(":first").click(); //Select first tab

    return this; //Chainable
  };
  $gx(function(){ $gx(".idTabs").each(function(){ $gx(this).idTabs(); }); });
})(jQuery)