Unbind mouseup?

我正在尝试从元素中解除mouseup事件的绑定。我试过以下方法,但都不管用。

$('#myElm').unbind('mouseup');
$('#myElm').unbind('onmouseup');
$('#myElm').unbind('click');

如何取消绑定使用$('myelm').mouseup(函数(…))分配的事件????

编辑:添加完整代码

cacheBgArea.mouseup(function(){
      var $cursorInElm = $(cacheBgArea.selectedText().obj);
      var selectFontSize = parseInt($cursorInElm.css('fontSize')), selectFontFace = $cursorInElm.css('fontFamily');
      $fontSizeSlider.slider('value', selectFontSize);

      $chooseFontFace.find('option').each(function(){
         var $this = $(this);
         if ($this.val() == selectFontFace) {
            $this.attr('selected', true);
            return false;
         }
      });
      log('font weight: ' + $cursorInElm.css('fontWeight'));
      if ($cursorInElm.css('fontWeight') == 'bold' || $cursorInElm.css('fontWeight') == 401) {
         $boldCheckbox.attr('checked', true).change();
      } else {
         $boldCheckbox.attr('checked', false).change();
      }

      var objText = cacheBgArea.selectedText();
      if (objText.obj.nodeName == 'a' || objText.obj.nodeName == 'A') {
         $cursorInElm = $(objText.obj)
         var elmsHref = $cursorInElm.attr('href');
         if (elmsHref && elmsHref != '#') {
            $enterOwnLink.val(elmsHref).show();
            $switchToPage.show();
            $chooseLinkPage.hide();
            $chooseLinkTitle.html('Enter a Web Address');
         } else if ($cursorInElm.attr('linkPageId')) {
            $chooseLinkPage.find('option').each(function(){
               var $this = $(this);
               if ($this.val() == $cursorInElm.attr('linkPageId')) {
                  $this.attr('selected', true);
                  return false;
               }
            });
            $enterOwnLink.hide();
            $switchToPage.hide();
            $chooseLinkPage.show();
            $chooseLinkTitle.html('Choose a Page');
         }
      } else {
         $('#noneLink').attr('selected', true);
         $enterOwnLink.hide();
         $switchToPage.hide();
         $chooseLinkPage.show();
         $chooseLinkTitle.html('Choose a Page');
      }
   });

我已经证实cachebgrain确实定义了。是的,在调用解除绑定之前绑定事件。这是解除绑定。(log只是console.log();的简写)

log('cacheBgArea.length: ' + cacheBgArea.length);
cacheBgArea.unbind('mouseup');//TODO: fix this, not unbinding...