var stIsIE = /*@cc_on!@*/false;

function orderBy(col) {
  var param = (orderBy.arguments.length == 2) && (orderBy.arguments[1] == 'desc') ? -1 : 1;
  return function (a, b) {
  if (a[col] == b[col]) {
  return 0;
  } else if (a[col] > b[col]) {
  return param;
  } else {
  return -param;
  }
  }
}

sorttable = {
	_timer : null,
  init: function() {
    if (arguments.callee.done) return;
    arguments.callee.done = true;
    if (this._timer) clearInterval(this._timer);
    if (!document.createElement || !document.getElementsByTagName) return;
    sorttable.DATE_RE = /^(\d\d?)[\/\.-](\d\d?)[\/\.-]((\d\d)?\d\d)$/;
    
    forEach(document.getElementsByTagName('table'), function(table) {
      if (table.className.search(/\bsortable\b/) != -1) {
        sorttable.makeSortable(table);
      }
    });
    
  },
  
  makeSortable: function(table) {
		span_thead = [];
    spans = ["", "caption_header", "", "time_header", "artist_header"];
		for(var i=0;i<spans.length;i++)
		{span_thead.push(document.getElementById(spans[i]));}
    headrow = table.tHead.rows[0].cells;
    for (var i=0; i<headrow.length; i++) {
      if (span_thead[i] && !span_thead[i].className.match(/\bsorttable_nosort\b/)) {
        mtch = span_thead[i].className.match(/\bsorttable_([a-z0-9]+)\b/);
        if (mtch) { override = mtch[1]; }
	      if (mtch && typeof sorttable["sort_"+override] == 'function') {
	        span_thead[i].sorttable_sortfunction = sorttable["sort_"+override];
	      } else {
	        span_thead[i].sorttable_sortfunction = sorttable.guessType(table,i);
	      }
	      span_thead[i].sorttable_columnindex = i;
	      span_thead[i].sorttable_tbody = table.tBodies[0];
	      dean_addEvent(span_thead[i],"click", function(e) {

          if (this.sorttable_columnindex == 1) {
            if(this.className .search(/\bsorttable_sorted\b/) != -1){
              play_list = play_list.sort(orderBy('title', 'desc'));
             } else play_list = play_list.sort(orderBy('title'));
          }

          if (this.sorttable_columnindex == 3) {
            if(this.className .search(/\bsorttable_sorted\b/) != -1){
              play_list = play_list.sort(orderBy('duration', 'desc'));
             } else play_list = play_list.sort(orderBy('duration'));
          }

          if (this.sorttable_columnindex == 4) {
            if(this.className .search(/\bsorttable_sorted\b/) != -1){
              play_list = play_list.reverse('artist');
             } else play_list = play_list.sort(orderBy('artist'));
          }



          if (this.className.search(/\bsorttable_sorted\b/) != -1) {
            sorttable.reverse(this.sorttable_tbody);
            this.className = this.className.replace('sorttable_sorted',
                                                    'sorttable_sorted_reverse');
						this.className = this.className.replace('sort_down','sort_up');
            return;
          }
          if (this.className.search(/\bsorttable_sorted_reverse\b/) != -1) {
            sorttable.reverse(this.sorttable_tbody);
            this.className = this.className.replace('sorttable_sorted_reverse',
                                                    'sorttable_sorted');
						this.className = this.className.replace('sort_up','sort_down');
            return;
          }
          theadrow = this.parentNode;
          forEach(theadrow.childNodes, function(cell) {
            if (cell.nodeType == 1) {
              cell.className = cell.className.replace('sorttable_sorted_reverse','');
              cell.className = cell.className.replace('sorttable_sorted','');
              cell.className = cell.className.replace("sort_up", '');
              cell.className = cell.className.replace("sort_down", '');
            }
          });
          
          this.className += ' sorttable_sorted';
          this.className += ' sort_down';
	        row_array = [];
	        col = this.sorttable_columnindex;
	        rows = this.sorttable_tbody.rows;
	        for (var j=0; j<rows.length; j++) {
	          row_array[row_array.length] = [sorttable.getInnerText(rows[j].cells[col]), rows[j]];
	        }
	        sorttable.shaker_sort(row_array, this.sorttable_sortfunction);
	        
	        tb = this.sorttable_tbody;
	        for (var j=0; j<row_array.length; j++) {
	          tb.appendChild(row_array[j][1]);
	        }
	        
	        delete row_array;
	        return false;
	      });
	    }
    }
  },
  
  guessType: function(table, column) {
    sortfn = sorttable.sort_alpha;
    for (var i=0; i<table.tBodies[0].rows.length; i++) {
      text = sorttable.getInnerText(table.tBodies[0].rows[i].cells[column]);
      if (text != '') {
        if (text.match(/^-?[£$¤]?[\d,.]+%?$/)) {
          return sorttable.sort_numeric;
        }
        possdate = text.match(sorttable.DATE_RE)
        if (possdate) {
          first = parseInt(possdate[1]);
          second = parseInt(possdate[2]);
          if (first > 12) {
            return sorttable.sort_ddmm;
          } else if (second > 12) {
            return sorttable.sort_mmdd;
          } else {
            sortfn = sorttable.sort_ddmm;
          }
        }
      }
    }
    return sortfn;
  },
  
  getInnerText: function(node) {
    hasInputs = (typeof node.getElementsByTagName == 'function') &&
                 node.getElementsByTagName('input').length;
    
    if (node.getAttribute("sorttable_customkey") != null) {
      return node.getAttribute("sorttable_customkey");
    }
    else if (typeof node.textContent != 'undefined' && !hasInputs) {
      return node.textContent.replace(/^\s+|\s+$/g, '');
    }
    else if (typeof node.innerText != 'undefined' && !hasInputs) {
      return node.innerText.replace(/^\s+|\s+$/g, '');
    }
    else if (typeof node.text != 'undefined' && !hasInputs) {
      return node.text.replace(/^\s+|\s+$/g, '');
    }
    else {
      switch (node.nodeType) {
        case 3:
          if (node.nodeName.toLowerCase() == 'input') {
            return node.value.replace(/^\s+|\s+$/g, '');
          }
        case 4:
          return node.nodeValue.replace(/^\s+|\s+$/g, '');
          break;
        case 1:
        case 11:
          var innerText = '';
          for (var i = 0; i < node.childNodes.length; i++) {
            innerText += sorttable.getInnerText(node.childNodes[i]);
          }
          return innerText.replace(/^\s+|\s+$/g, '');
          break;
        default:
          return '';
      }
    }
  },
  
  reverse: function(tbody) {
    newrows = [];
    for (var i=0; i<tbody.rows.length; i++) {
      newrows[newrows.length] = tbody.rows[i];
    }
    for (var i=newrows.length-1; i>=0; i--) {
       tbody.appendChild(newrows[i]);
    }
    delete newrows;
  },
  
  sort_numeric: function(a,b) {
    aa = parseFloat(a[0].replace(/[^0-9.-]/g,''));
    if (isNaN(aa)) aa = 0;
    bb = parseFloat(b[0].replace(/[^0-9.-]/g,'')); 
    if (isNaN(bb)) bb = 0;
    return aa-bb;
  },
  sort_alpha: function(a,b) {
    if (a[0].toLowerCase()==b[0].toLowerCase()) return 0;
    if (a[0].toLowerCase()<b[0].toLowerCase()) return -1;	
    return 1;
  },
  sort_ddmm: function(a,b) {
    mtch = a[0].match(sorttable.DATE_RE);
    y = mtch[3]; m = mtch[2]; d = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt1 = y+m+d;
    mtch = b[0].match(sorttable.DATE_RE);
    y = mtch[3]; m = mtch[2]; d = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt2 = y+m+d;
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
  },
  sort_mmdd: function(a,b) {
    mtch = a[0].match(sorttable.DATE_RE);
    y = mtch[3]; d = mtch[2]; m = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt1 = y+m+d;
    mtch = b[0].match(sorttable.DATE_RE);
    y = mtch[3]; d = mtch[2]; m = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt2 = y+m+d;
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
  },
  
  shaker_sort: function(list, comp_func) {
    var b = 0;
    var t = list.length - 1;
    var swap = true;

    while(swap) {
        swap = false;
        for(var i = b; i < t; ++i) {
            if ( comp_func(list[i], list[i+1]) > 0 ) {
                var q = list[i]; list[i] = list[i+1]; list[i+1] = q;
                swap = true;
            }
        } // for
        t--;

        if (!swap) break;

        for(var i = t; i > b; --i) {
            if ( comp_func(list[i], list[i-1]) < 0 ) {
                var q = list[i]; list[i] = list[i-1]; list[i-1] = q;
                swap = true;
            }
        } // for
        b++;

    }
  }  
}

function dean_addEvent(element, type, handler) {
	if (element.addEventListener) {
		element.addEventListener(type, handler, false);
	} else {
		if (!handler.$$guid) handler.$$guid = dean_addEvent.guid++;
		if (!element.events) element.events = {};
		var handlers = element.events[type];
		if (!handlers) {
			handlers = element.events[type] = {};
			if (element["on" + type]) {
				handlers[0] = element["on" + type];
			}
		}
		handlers[handler.$$guid] = handler;
		element["on" + type] = handleEvent;
	}
};
dean_addEvent.guid = 1;

function removeEvent(element, type, handler) {
	if (element.removeEventListener) {
		element.removeEventListener(type, handler, false);
	} else {
		if (element.events && element.events[type]) {
			delete element.events[type][handler.$$guid];
		}
	}
};

function handleEvent(event) {
	var returnValue = true;
	event = event || fixEvent(((this.ownerDocument || this.document || this).parentWindow || window).event);
	var handlers = this.events[event.type];
	for (var i in handlers) {
		this.$$handleEvent = handlers[i];
		if (this.$$handleEvent(event) === false) {
			returnValue = false;
		}
	}
	return returnValue;
};

function fixEvent(event) {
	event.preventDefault = fixEvent.preventDefault;
	event.stopPropagation = fixEvent.stopPropagation;
	return event;
};
fixEvent.preventDefault = function() {
	this.returnValue = false;
};
fixEvent.stopPropagation = function() {
  this.cancelBubble = true;
}

if (!Array.forEach) { // mozilla already supports this
	Array.forEach = function(array, block, context) {
		for (var i = 0; i < array.length; i++) {
			block.call(context, array[i], i, array);
		}
	};
}

Function.prototype.forEach = function(object, block, context) {
	for (var key in object) {
		if (typeof this.prototype[key] == "undefined") {
			block.call(context, object[key], key, object);
		}
	}
};

String.forEach = function(string, block, context) {
	Array.forEach(string.split(""), function(chr, index) {
		block.call(context, chr, index, string);
	});
};

var forEach = function(object, block, context) {
	if (object) {
		var resolve = Object; // default
		if (object instanceof Function) {
			resolve = Function;
		} else if (object.forEach instanceof Function) {
			object.forEach(block, context);
			return;
		} else if (typeof object == "string") {
			resolve = String;
		} else if (typeof object.length == "number") {
			resolve = Array;
		}
		resolve.forEach(object, block, context);
	}
};