var showLength = 20 ; // 表示文字数

        onload = function() {
          elements = document.getElementsByTagName("*") ;
          for (var i = 0; i < elements.length; ++i)
            with (elements[i])
              if (className == "NextText" && innerHTML.length > showLength)
                innerHTML = innerHTML.substr(0, showLength) + '…' ;
				}