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火狐和IE都支持网页字体变大变小、复制、收藏、打印

    <script type="text/javascript">
 //设置页面文字大小
 function SetFontSize(areaid, size) {
      document.getElementById(areaid).style.fontSize = size + "px";
 }
    //加入收藏
    function addfavorite(href,title)
    {
           if (document.all)
          {
                     window.external.addFavorite(href,title);
            }
            else if (window.sidebar)
           {
                      window.sidebar.addPanel(title, href, "");
             }
    }

    //复制url
    function copyToClipboard(txt) {     
           if(window.clipboardData) {     
                     window.clipboardData.clearData();     
                    window.clipboardData.setData("Text", txt);    
                     alert("复制成功!")   
           } else if(navigator.userAgent.indexOf("Opera") != -1) {     
                 window.location = txt;     
                  alert("复制成功!");  
            } else if (window.netscape) {     
                try {     
                      netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");     
                 } catch (e) {     
                     alert("被浏览器拒绝!\n请在浏览器地址栏输入'about:config'并回车\n然后将 'signed.applets.codebase_principal_support'设置为'true'");     
                 }     

          var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);     
                if (!clip)     
                      return;     
                 var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);     
                 if (!trans)     
                     return;     
                 trans.addDataFlavor('text/unicode');     
                var str = new Object();     
                 var len = new Object();     
                 var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);     
                 var copytext = txt;
                 str.data = copytext;     
                 trans.setTransferData("text/unicode",str,copytext.length*2);     
                var clipid = Components.interfaces.nsIClipboard;     
                 if (!clip)     
                      return false;     
                clip.setData(trans,null,clipid.kGlobalClipboard);     
                 alert("复制成功!")     
            }     
      }

    </script>

 Java学习网整理使用方法:

 字号【<a href="javascript:SetFontSize('txtcontent','18')">大</a> <a href="javascript:SetFontSize('txtcontent','16')">中</a> <a href="javascript:SetFontSize('txtcontent','14')">小</a>】< /span>
 <A href="javascript:void(0)" onclick= "addfavorite( location.href,'Java学习网')">加入收藏</A>
 <A onclick="copyToClipboard(location.href)" href="javascript:void(0)">指定内容复制</A>
 <A  href="javascript:window.print()">打印</A>

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