function traverseDOM(node){
  var childLen=node.childNodes.length;
  if(childLen==0){
  }else{
    for(var i=0;i<childLen;i++){
      var childTmp=node.childNodes[i];
      if(childTmp.id=="J_FLOATDIV"){
        var str="hello world";
      }
      if(childTmp.nodeType==1){
        var obj=window.getComputedStyle(childTmp);
        if(obj.hasOwnProperty("position")){
          if(obj.position=="fixed" && obj.bottom=="0px"){
            console.log("the fixed element");
            console.log(childTmp);
            childTmp.style.display="none";
            return;
          }
        }
      }
      traverseDOM(childTmp);
    }
  }
}



setTimeout(function(){
 traverseDOM(document.body);
},1000);





@@ -182,27 +182,62 @@
 Tmp.
-id==%22J_FLOAT
+nodeType==1)%7B%0A        if(childTmp.nodeName==%22
 DIV%22)%7B%0A
+  
     
@@ -264,50 +264,20 @@
 orld
+!
 %22
-;
 %0A      
-%7D%0A      if(childTmp.nodeType==1)%7B
+  %7D
 %0A   

Update test.js