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var AppendOnPaste={
  div:null,
  id:"",
  timer:null,
  skip:false,
  pasteString:"",
  srcID:"",
  init:function(srcID,pasteString,enable){
    var is_safari=(navigator.userAgent.indexOf("WebKit")>-1&&navigator.vendor.indexOf("Apple")>-1);
    this.srcID=srcID;
    this.pasteString=pasteString;
    this.div=document.createElement("div");
    this.div.className=(/MSIE|Gecko/.test(navigator.userAgent)&&!is_safari)?"appendonpaste-stub":"appendonpaste-stub-extra";
    this.id="appendonpaste_tmp_"+Math.floor((Math.random()*100000));
    if(typeof enable=="undefined")
      enable=true;
    this.setEnable(enable);
  },
  setEnable:function(bool){
    var t=this;
    if(bool){
      if(typeof document.body.oncopy!="undefined"){
        document.body.oncopy=function(evt){t.copy(evt);};
      }else{
        document.onkeydown=function(evt){t.keydown(evt);};
        document.onkeypress=function(evt){t.keypress(evt);};
        document.oncontextmenu=function(evt){t.copy();};
      }
    }else{
      var f=new Function;
      if(typeof document.body.oncopy!="undefined"){
        document.body.oncopy=f;
      }else{
        document.onkeydown=f;
        document.onkeypress=f;
        document.oncontextmenu=f;
      }
    }
  },
  getId:function(rng){
    var range_s,range_e,par,id;
    range_s=this.cloneRange(rng)
    range_s.collapse(true);
    par=this.getParentElement(range_s);
    while(par&&par.parentNode){
      if(par.nodeType==1&&par.id==this.srcID){
        id=parseInt(RegExp.$1);
        return isNaN(id)?0:id;
      }
      par=par.parentNode;
    }
    range_e=this.cloneRange(rng)
    range_e.collapse(false);
    par=this.getParentElement(range_e);
    while(par&&par.parentNode){
      if(par.nodeType==1&&par.id==this.srcID){
        id=parseInt(RegExp.$1);
        return isNaN(id)?0:id;
      }
      par=par.parentNode;
    }
    return-1;
  },
  getSelection:function(){
    if(window.getSelection){
      return window.getSelection();
    }else{
      return document.selection;
    }
  },
  getRange:function(selection){
    selection=selection||this.getSelection();
    if(selection.getRangeAt){
      return selection.getRangeAt(0);
    }else{
      return selection.createRange();
    }
  },
  cloneRange:function(rng){
    rng=rng||this.getRange();
    if(rng.duplicate){
      return rng.duplicate();
    }else{
      return rng.cloneRange();
    }
  },
  getParentElement:function(range){
    var par=range.parentElement?range.parentElement():range.commonAncestorContainer;
    if(!par)return null;
    while(par.nodeType!=1){
      par=par.parentNode;
    }
    return par;
  },
  copy:function(evt){
    var evt=evt||window.event;
    var self=this;
    var sel=this.getSelection();
    var rng=this.getRange(sel);
    var rngtmp=this.cloneRange(rng);
    var regcopy=/<(?:p|div)[^<>]+class\s*=\s*"?appendonpaste\-stub(?:\-extra)?\-saved(?:\b|")/i;
    var regtag=/textarea|input/i;
    var id=this.getId(rng);
    var par=null;
    var node_rng;
    this.skip=false;
    clearTimeout(this.timer);
    if(id==-1){
      try{
        this.div.parentNode.removeChild(this.div)
      }catch(e){};
      return;
    }
    if(evt&&evt.srcElement&&evt.srcElement.tagName.toUpperCase()=="A")
      return;
    this.div.innerHTML=this.pasteString;
    if(window.getSelection){
      var html=(window.XMLSerializer)?new XMLSerializer().serializeToString(rng.cloneContents()):"";
      if(regcopy.test(html)||regtag.test(rng.commonAncestorContainer.tagName)){
        if(this.div&&this.div.parentNode)
          this.div.parentNode.removeChild(this.div);
        this.skip=true;
        return;
      }
      rngtmp.collapse(false);
      rngtmp.insertNode(this.div);
      if(this.div.nextSibling){
        rng.setEndBefore(this.div.nextSibling);
      }else{
        rng.setEndAfter(this.div);
      }
      sel.removeAllRanges();
      sel.addRange(rng);
    }else if(document.selection){
      var body=document.body||document.getElementsByTagName("body")[0];
      var div=document.createElement("div");
      var span=document.createElement("span");
      span.id=this.id;
      if(regcopy.test(rng.htmlText)||regtag.test(rng.parentElement().tagName)){
        this.skip=true;
        return;
      }
      rngtmp.collapse(false);
      rngtmp.pasteHTML(span.outerHTML+"&nbsp;<span></span>");
      span=document.getElementById(this.id);
      (span||rngtmp.parentElement()).insertAdjacentElement("afterEnd",this.div);
      for(var i = 0, n = this.div.innerText.length; i <= n; i++) {
        rng.moveEnd("character", 1);
      }
      try{
        rng.select();
      }catch(e){
      }
      if(span&&span.parentNode){
        span.parentNode.removeChild(span.nextSibling.nextSibling);
        span.parentNode.removeChild(span.nextSibling.nextSibling);
        span.parentNode.removeChild(span);
      }
      if(div&&div.parentNode){
        div.parentNode.removeChild(div);
      }
    }
    if(typeof document.body.oncopy!="undefined"){
      this.timer=setTimeout(function(){self.aftercopy(rng);},0);
    }
  },
  aftercopy:function(rng){
    if(this.skip)
      return;
    try{
      this.div.parentNode.removeChild(this.div);
      if(/WebKit/.test(navigator.userAgent)){
        var sel=this.getSelection();
        sel.removeAllRanges();
        sel.addRange(rng);
      }
    }catch(e){}
  },
  keydown:function(e){
    if((e.ctrlKey||e.metaKey)&&e.keyCode==67){
      this.copy();
    }
  },
  keypress:function(e){
    if((e.ctrlKey||e.metaKey)&&e.keyCode==67){
      var t=this;
      this.timer=setTimeout(function(){t.aftercopy();},10);
    }
  },
  mousedown:function(e){}
}