n简单的问题！！！

改成
var dragObj = document.form1.block1；
试试看

dragObj = document.form1.block1;
应该写成
dragObj = document.all.block1;

dragObj = document.all.block1;

改成
dragObj = document.all("block1");
就可以了。

直接用dragObj=block1就成了，这就是ID的好处

谢谢各位！！！我还有一个问题，解答之后马上放分！！
我是想用鼠标拖动控件，按照各位大侠的提示，已经可以将<span>标签内的内容拖动，但我想将一个Button拖动，如何实现？？代码如下：
<HTML>
<HEAD>
<TITLE>Drag and Drop Internet Explorer 4</TITLE>
<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>
</HEAD><BODY onLoad="init()">
<form name="form1">
    <input type=button id="button1" value="Submit" onMouseOver="mouseOver()" onMouseOut="drag=0">
    <span ID="block1" onMouseOver="mouseOver()" onMouseOut="drag=0" lzh</span>
</form>
</BODY></HTML>

<HTML>
<HEAD>
<TITLE>Drag and Drop Internet Explorer 4</TITLE>
<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>
</HEAD><BODY onLoad="init()">
<form name="form1">
    <span style=cursor:hand;position:absolute;left:100;top:100; ID="block1" onMouseOver="mouseOver()" onMouseOut="drag=0">    <input type=button id="button1" value="Submit" onMouseOver="mouseOver()" onMouseOut="drag=0">
</span>
</form>
</BODY></HTML>

<HTML>
<HEAD>
<STYLE>
#aDiv {
  position: absolute;
  left: 200px;
  top: 0px;
  width: 20px;
  height: 100px;
  background-color: blue;
  layer-background-color: blue;
}
</STYLE>
<SCRIPT>
var dragElement;
var elY,elX;
var mouseDownX,mouseDownY;
function getPageY (element) {
  var y = 0;
  var x = 0;
  do
    y += element.offsetTop;
  while ((element = element.offsetParent));
  return y;
}
function getPageX (element) {
  var x = 0;
  do
    x += element.offsetLeft;
  while ((element = element.offsetParent));
  return x;
}
function startDrag (element, evt) {
  dragElement = element;
   elX = getPageX (dragElement);
    mouseDownX = evt.clientX;
   elY = getPageY (dragElement);
    mouseDownY = evt.clientY;  document.onmousemove = drag;
}
function drag (evt) {
  if (document.layers)
    dragElement.top = elY + evt.pageY - mouseDownY;
  else if (document.all)
    {dragElement.style.pixelTop = elY + event.clientY - mouseDownY;dragElement.style.pixelLeft = elX + event.clientX - mouseDownX;}

}
function stopDrag () {
  document.onmousemove = null;
  dragElement = null;
  if (document.layers)
    document.releaseEvents(Event.MOUSEMOVE);
}
</SCRIPT>
</HEAD>
<BODY>
<DIV ID="aDiv"
     ONMOUSEDOWN="startDrag(this, event);"
     ONMOUSEUP="stopDrag();"
><input type=button value="拖动"></DIV>
<SCRIPT>
if (document.layers) {
  document.aDiv.clip.width = 20;
  document.aDiv.clip.height = 100;
  document.aDiv.captureEvents(Event.MOUSEDOWN | Event.MOUSEUP);
  document.aDiv.onmousedown = function (evt) {
    startDrag(this, evt);
  };
  document.aDiv.onmouseup = function (evt) {
    stopDrag();
  };
}
</SCRIPT></BODY>
</HTML>

谢谢!谢谢！谢谢net_lover(孟子E章) ，qiushuiwuhen(秋水无恨) ， weidegong(weidegong)，gdxy(GBOY)， jxwangzhigang(一棵草)还有 benjamin9(丢丢) ！以后有问题还要麻烦各位！！:)

调试易

n简单的问题！！！

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