util--可以用来写在线编辑器

Util = new UtilTools();
 
/**
 * 本代码可随意使用,请保留下面的网址.
 * WebSite:
 */
  
function UtilTools()
  {
   //取元素

   this.gE = function (el)
   {
    if(typeof el == 'string')
     return document.getElementById(el);
    else
     return el;
   }
   
   //取嵌套页面的元素

   this.gFE = function (win,el)
   {
    try{
     if(typeof el == 'string')
      return document.getElementById(win).contentWindow.document.getElementById(el);
     else
      return document.getElementById(win).contentWindow.document.el;
    }catch(e){throw e;}
   }
   
   //判断浏览器

   this.isIE = function ()
   {
    //Detect:BrowserDetector.js

    //google.com

    return Detect.IE();
   }
   
   //取页面被选中部分

   this.gR = function (el)
   {
    try{
     if(typeof el == 'undefined' && !isIE())
      return document.getSelection();
     if(this.isIE())
      if(window.getSelection) return window.getSelection();
      else if(document.getSelection) return document.getSelection();
      else if(document.selection) return document.selection.createRange().text;
      else return;
     else
      el = this.gE(el);
      return el.value.substr(el.selectionStart,el.selectionEnd - el.selectionStart);
    }catch(e){throw e;}
   }
   
   //取嵌套页面被选中部分

   this.gFR = function (frame,el)
   {
    try{
     if(this.isIE())
     {
      var win = this.gE(frame).contentWindow;
      var doc = win.document;
      if(win.getSelection) return win.getSelection();
      else if(doc.getSelection) return doc.getSelection();
      else if(doc.selection) return doc.selection.createRange().htmlText;
      else return;
     }else{
      if(typeof el == 'undefined')
       return this.gE(frame).contentWindow.document.getSelection();
      else
       el = this.gFE(frame,el);
       return el.value.substr(el.selectionStart,el.selectionEnd - el.selectionStart);
     }
    }catch(e){throw e;}
   }
   
   //取嵌套页面的 document 内容

   this.gFC = function (frame)
   {
    return this.gFD(frame).body.innerHTML;
   }
   
   //取嵌套页面的 document 对象

   this.gFD = function (frame)
   {
    return this.gE(frame).contentWindow.document;
   }
   
   //取嵌套页面的 window 对象

   this.gFW = function (frame)
   {
    return this.gE(frame).contentWindow;
   }
   
   //替换嵌套页面选中部分

   this.sFR = function (win,text)
   {
    try{
     if(this.isIE())
     {
      var rang = this.gFD(win).selection.createRange();
      text = this.rH(text);
      rang.pasteHTML(text);
      return range;
     }else{
      var range = this.gFW(win).getSelection().getRangeAt(0);
      range.deleteContents();
      var df = document.createDocumentFragment();
      var span = document.createElement('div');
      span.innerHTML = text;
      df.appendChild(span.firstChild);
      range.insertNode(df);
      return range;
     }
    }catch(e){throw e;}
   }
   
   this.setChild = function (pnode,cnode)
   {
    pnode.appendChild(cnode);
   }
 
 //追加元素到页面

 /**
  * nodeName: 要追加的标签类型 形式为 tagname:type:name
  * strId: 要追加的标签的ID
  * appendTo:追加到指定元素里.默认为document
  * label:针对该标签的label
  */
 this.aE = function (nodeName, strId, appendTo,label)
 {
    var node = nodeName.split(':');
    if(this.isIE() && node[2]){//fix ie

     var el = document.createElement('<' + node[0] + ' name="' + node[2] + '"/>');
    }else{
     var el = document.createElement(node[0]);
    }
    if(node[1])
   el.setAttribute('type',node[1]);
    if(node[2])
   el.setAttribute('name',node[2]);
    if(strId)
   el.setAttribute("id", strId);
    if (appendTo) {
      this.gE(appendTo).appendChild(el);
    } else {
      document.body.appendChild(el);
    }
    if(label) {
     if(node[1] && node[1] == 'button')
     {
    el.value = label;
     }else{
     var lab = document.createElement('label');
    lab.setAttribute('for',strId);
    lab.innerHTML = label + ':';
     el.parentNode.insertBefore(lab,el);
     }
     }
    return el;
 };
   
   //替换当前页面选中元素内容

   this.sR = function (el,text)
   {
    try{
     if(this.isIE())
     {
      var s = this.gR(el);
      var exp = new RegExp(s);
      this.gE(el).value = this.gE(el).value.replace(exp,text);
      return this.gE(el);
     }else{
      var s = this.gR(el);
      var exp = new RegExp(s);
      this.gE(el).value = this.gE(el).value.replace(exp,text);
      return this.gE(el);
     }
    }catch(e){throw e;}
   }
   
   //用指定 标签 环绕选中区域

   this.aT = function (el,stag,etag)
   {
    try{
     var r = this.gR(el);
     var s = stag + r + etag;
     this.sR(el,s);
    }catch(e){throw e;}
   }
   
   //追加内容到选中区域前

   this.aFRB = function (win,text)
   {
    try{
     if(this.isIE())
     {
      var rang = this.gFD(win).selection.createRange();
      var r = this.gFR(win);
      text = this.rH(text);
      rang.pasteHTML(text + r);
      return range;
     }else{
      var range = this.gFW(win).getSelection().getRangeAt(0);
      var df = document.createDocumentFragment();
      var span = document.createElement('div');
      span.innerHTML = text;
      df.appendChild(span.firstChild);
      range.insertNode(df);
      span = null;
      df = null;
      return range;
     }
    }catch(e){throw e;}
   }
   
   //代码补全,只补闭标签,IE 下补全自定义标签需要 xmlns

   //

   // ,

   this.rH = function (text)
   {
    var d = document.createElement('div');
    d.innerHTML = text;
  return d.innerHTML;
   }
 }