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我试图实现简单的不依赖于外部库的可拖动轻视窗口问题是该窗口已创建但它是静态的而不是可拖动的，它与我从这个参考网络示例中获取的代码相同：http: //codelifter.com/main/ javascript/dragablelayer.html：

这一切都发生在 charom 扩展的内容脚本中：

var s = document.createElement('script');
s.src = chrome.extension.getURL('client.js');
s.onload = function() {
    s.parentNode.removeChild(s);
};

try{
(document.head||document.documentElement||document.body).appendChild(s);
}catch(e){
  console.log("exception in appendChild");
}

客户端.js：

isIE=document.all;
isNN=!document.all&&document.getElementById;
isN4=document.layers;
isHot=false;

function ddInit(e){
  topDog=isIE ? "BODY" : "HTML";
  whichDog=isIE ? document.all.theLayer : document.getElementById("theLayer");  
  hotDog=isIE ? event.srcElement : e.target;  
  while (hotDog.id!="titleBar"&&hotDog.tagName!=topDog){
    hotDog=isIE ? hotDog.parentElement : hotDog.parentNode;
  } 

  if (hotDog.id=="titleBar"){
    offsetx=isIE ? event.clientX : e.clientX;
    offsety=isIE ? event.clientY : e.clientY;
    nowX=parseInt(whichDog.style.left);
    nowY=parseInt(whichDog.style.top);
    ddEnabled=true;
    document.onmousemove=dd;
  }
}

function dd(e){
  //console.log("Starting draging");
  if (!ddEnabled) 
  {
    //console.log("continue draging !ddEnabled");
    return;
  }
  whichDog.style.left=isIE ? nowX+event.clientX-offsetx : nowX+e.clientX-offsetx; 
  whichDog.style.top=isIE ? nowY+event.clientY-offsety : nowY+e.clientY-offsety;
  return false;  
}

function ddN4(whatDog){
  if (!isN4) return;
  N4=eval(whatDog);
  N4.captureEvents(Event.MOUSEDOWN|Event.MOUSEUP);
  N4.onmousedown=function(e){
    N4.captureEvents(Event.MOUSEMOVE);
    N4x=e.x;
    N4y=e.y;
  }
  N4.onmousemove=function(e){
    if (isHot){
      N4.moveBy(e.x-N4x,e.y-N4y);
      return false;
    }
  }
  N4.onmouseup=function(){
    N4.releaseEvents(Event.MOUSEMOVE);
  }
}

function hideMe(){
  if (isIE||isNN) whichDog.style.visibility="hidden";
  else if (isN4) document.theLayer.visibility="hide";
}

function showMe(){
  if (isIE||isNN) whichDog.style.visibility="visible";
  else if (isN4) document.theLayer.visibility="show";
}

try{
    console.log("Starting to create tabel");
    var layerNode= document.createElement('div');
    layerNode.setAttribute('id','theLayer');
    layerNode.style.position="absolute";
    layerNode.style.width="250px";
    layerNode.style.left="100";
    layerNode.style.top="100";
    layerNode.style.visibility="visible";

    var tableNode= document.createElement('table');
    tableNode.setAttribute('border','0');
    tableNode.setAttribute('width','250');
    tableNode.setAttribute('bgcolor','#424242');
    tableNode.setAttribute('cellspacing','0');
    tableNode.setAttribute('cellpadding','5');  
    var newRow = tableNode.insertRow();
    var oCell = newRow.insertCell();
    oCell.setAttribute('width','100%');
    oCell.innerHTML =  "<table border='0' width='100%' cellspacing='0' cellpadding='0' height='36'><tr>"+
                      "<td id='titleBar' style='cursor:move' width='100%'>"+
                      "<ilayer width='100%' onSelectStart='return false'>"+
                      "<layer width='100%' onMouseover='isHot=true;if (isN4) ddN4(theLayer)' onMouseout='isHot=false'>"+
                      "<font face='Arial' color='#FFFFFF'>Layer Title</font></layer></ilayer></td>"+
                      "<td style='cursor:hand' valign='top'>"+
                      "<a href='#' onClick='hideMe();return false'><font color=#ffffff size=2 face=arial  style='text-decoration:none'>X</font></a></td></tr><tr>"+
                      "<td width='100%' bgcolor='#FFFFFF' style='padding:4px' colspan='2'>"+
                        "This is where your content goes.<br>"+
                        "It can be any html code or text.<br>"+
                        "Remember to feed the reindeer.<br>"+
                        "Avoid chewable giblet curtains."+
                      "</td></tr></table>";




    layerNode.appendChild(tableNode);
    document.body.appendChild(layerNode);

    document.onmousedown=ddInit;
    document.onmouseup=Function("ddEnabled=false");
    console.log("Ending to create tabel");
}
catch(e){
  console.log("script in page exception in appendChild"+e);
  //alert(e);
}
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