selection.createRange() 用法例子
   <Script Language="JavaScript">
    function addLink(){
    var oRange = document.selection.createRange();
    if(oRange.text!=’’){
    var oUrl = window.prompt(’链接网址...’,’http://www.163.com/’);
    var oHtml = ’<a href=’+oUrl+’ target=_blank>’+oRange.text+’</a>’;
    oRange.pasteHTML(oHtml);
    }else{
    window.alert(’您没有选择加链接的文字!’);
    }
    }
   </Script>
   网易 新浪 搜狐<br><br>
   <input type="button" value="添加链接" onclick="addLink();">
   
   
   
   <Script Language="JavaScript" defer>
    function addLink(){
    var oRange = self[’oIframe’].document.selection.createRange();
    if(oRange.htmlText!=’’){
    var oUrl = window.prompt(’链接网址...’,’http://www.51js.com/’);
    var oHtml = ’<a href=’+oUrl+’ target=_blank>’+oRange.htmlText+’</a>’;
    oRange.pasteHTML(oHtml);
    }else{
    window.alert(’您没有选择加链接的文字或图片!’);
    }
    }
    function editLink(){
    self[’oIframe’].document.designMode = ’on’;
    }
    function seeLink(){
    self[’oIframe’].document.designMode = ’off’;
    }
    self[’oIframe’].document.designMode = ’on’;
   </Script>
   <table>
    <tr>
    <td>
    <iframe );
    }
   }
   
   //-->
   </SCRIPT>

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