使用这个jQuery插件(需要配合相应的css，见以下例子)：

(function($) {
  $.fn.ellipsis = function(enableUpdating){
    var s = document.documentElement.style;
    if (!('textOverflow' in s || 'OTextOverflow' in s)) {
      return this.each(function(){
        var el = $(this);
        if(el.css("overflow") == "hidden"){
          var originalText = el.html();
          var w = el.width();

          var t = $(this.cloneNode(true)).hide().css({
                        'position': 'absolute',
                        'width': 'auto',
                        'overflow': 'visible',
                        'max-width': 'inherit'
                    });
          el.after(t);

          var text = originalText;
          while(text.length > 0 && t.width() > el.width()){
            text = text.substr(0, text.length - 1);
            t.html(text + "...");
          }
          el.html(t.html());

          t.remove();

          if(enableUpdating == true){
            var oldW = el.width();
            setInterval(function(){
              if(el.width() != oldW){
                oldW = el.width();
                el.html(originalText);
                el.ellipsis();
              }
            }, 200);
          }
        }
      });
    } else return this;
  };
})(jQuery);

例：

<p id="hello" style="text-overflow:ellipsis;-o-text-overflow:ellipsis;-ms-text-overflow:ellipsis;width: 150px;white-space: nowrap;overflow:hidden;">Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World Hello World </p>

<script>
$('#hello').ellipsis();
</script>