获取被拖动的对象的ID

<! DOCTYPE HTML PUBLIC  " -//W3C//DTD HTML 4.0 Transitional//EN " > < HTML > < HEAD > < TITLE >  New Document  </ TITLE > < META NAME = " Generator "  CONTENT = " EditPlus " > < META NAME = " Author "  CONTENT = "" > < META NAME = " Keywords "  CONTENT = "" > < META NAME = " Description "  CONTENT = "" > </ HEAD > < BODY > < SCRIPT LANGUAGE = " JavaScript " > <!-- var  ie = document.all; var  nn6 = document.getElementById &&! document.all; var  isdrag = false ; var  y; var  dobj; function  movemouse(e) ... {  if (isdrag)  ...{    dobj.style.top  = nn6 ? ty + e.clientY - y : ty + event.clientY - y;    return false;  }} function  selectmouse(e) ... {  var fobj = nn6 ? e.target : event.srcElement;  var topelement = nn6 ? "HTML" : "BODY";  while (fobj.tagName != topelement && fobj.className != "dragme")  ...{    fobj = nn6 ? fobj.parentNode : fobj.parentElement;  }  if (fobj.className=="dragme")  ...{    isdrag = true;    dobj = fobj; //alert(dobj.id);显示被拖动图片的ID    ty = parseInt(dobj.style.top+0);    y = nn6 ? e.clientY : event.clientY;    document.onmousemove=movemouse;    return false;  }} document.onmousedown = selectmouse;document.onmouseup = new  Function( " isdrag=false " ); // --> </ SCRIPT > < style > .dragme ... {position:relative;} </ style > < img src = " images/1.jpg "  id = " image1 "  class = " dragme " > < img src = " images/2.jpg "  id = " image2 "  class = " dragme " > < img src = " images/3.jpg "  id = " image3 "  class = " dragme " > </ BODY > </ HTML >