var ey=0,ex=0,lx=0,ly=0,canDrg=false,thiso=null;//
var x, y,rw,rh;
  var divs=document.getElementsByTagName("div");
  for (var i=0;i<divs.length;i++){  
    if(divs[i].getAttribute("rel")=="drag"){
      divs[i].onmousemove=function(){
       thismove(this);//实时得到当前对象与鼠标的值以判断拖动及关闭区域;
    }
    }
  }

function thismove(o){
    rw=parseInt(x)-parseInt(o.style.left);
    rh=parseInt(y)-parseInt(o.style.top);
  }
function dargit(o,e){
thiso = o;
canDrg = true;
 if(!document.all){
      lx = e.clientX; ly = e.clientY;
      }else{
        lx = event.x; ly = event.y;
    }
 if(document.all) thiso.setCapture();
    
  st(o);//置前或置后
 
}

document.onmousemove = function(e){
if(!document.all){ x = e.clientX; y = e.clientY; }else{ x = event.x; y = event.y; }
if(canDrg){
    //if(rh<=20 && rw<180 ){//如果要设定拖动区域可以作判断
  var ofsx = x - lx;
  thiso.style.left = parseInt(thiso.style.left) + ofsx;
  lx = x;
  var ofsy = y - ly;
  thiso.style.top = parseInt(thiso.style.top) + ofsy;
  ly = y;
  //}else{canDrg=false;}
}
}

document.onmouseup=function(){
      canDrg=false;//拖拽变量设为false
      if(document.all && thiso != null){
        //ie下，将清捕获;
         thiso.releaseCapture();
       thiso = null;
   }
}


function set(obj){
     obj=obj.parentNode.parentNode;
     if(obj.getAttribute("rel"));
     //obj.style.zIndex=1;
     
}
function st(o){

var p = o.parentNode;
if(p.lastChild != o){
  p.appendChild(o);
}

if(rh<=20 && rw>=180){
canDrg=false;
//如果选择的是关闭区域;
      window.status=rw+"|"+rh;
      if(p.firstChild == o) return;
      p.insertBefore(o, p.firstChild);
        }
}