function cancelShowSysDetailInfo(evt){
  clearData("info");
 }
 
 function clearData(obj){
 var gg=dlist_svgDocument.getElementById(obj);
 var ind=gg.childNodes.length;
 while(gg.hasChildNodes)
        {
           gg.removeChild(gg.firstChild);
        }
   } 
这个是移开的代码，

rect.setAttribute("onmousemove","showSysDetailInfo(evt)");

function showSysDetailInfo(evt){
  
  var node = evt.getTarget();
        var id = node.getAttribute("id");
        
        var Xcoordinate =evt.getClientX();
        var Ycoordinate =evt.getClientY()-15;
        var rectwidth=200;
        var rectheight=50;
        createRect(Xcoordinate,Ycoordinate,rectwidth,rectheight,id);

 }
 
 //paint info rect
 function createRect(x,y,width,height,infostr){
   var displayDiv=dlist_svgDocument.createElement("rect");
   var ginfo=dlist_svgDocument.getElementById("info");
   displayDiv.setAttribute("x",x);
   displayDiv.setAttribute("y",y);
   displayDiv.setAttribute("width",width);
   displayDiv.setAttribute("height",height); 
   displayDiv.setAttribute("stroke","#81CEED");
   displayDiv.setAttribute("stroke-width","1");
   displayDiv.setAttribute("fill","none");
   displayDiv.setAttribute("id","rect_"+infostr); 
   ginfo.appendChild(displayDiv);
   var did=infostr.split(",")[2];
   var dip=infostr.split(",")[3];
   var dname=infostr.split(",")[4];
   var status=infostr.split(",")[1];
   paintText2(x,y,status,did,dip,dname,"info");
 }
 
 function paintText2(x,y,status,did,dip,dname,ginfo){
   var gginfo=dlist_svgDocument.getElementById(ginfo);
  if(status==0){
   var x1=Number(x)+10;
   var y1=Number(y)+10;
   infoCreateText(x1,y1,"设备名:",gginfo);
   
  }else{
   var x1=Number(x)+10;
   var y1=Number(y)+10;
   infoCreateText(x1,y1,"设备名:",gginfo);
  }
 }
这个是鼠标放在rect上的代码