在iframe中找出html元素的位置

Question

I want to find out the position of an element which is in iframe. I am trying ot use:-

//Function to find the position of element on page
function getElementPosition(elem){
  var posX = 0;
  var posY = 0;
  while(elem!= null){  
        posX += elem.offsetLeft;  
        posY += elem.offsetTop;  
        elem = elem.offsetParent;
    console.log("In function:" + elem.tagName + " " + posX + " " + posY);
  }                              
 return { x : posX, y : posY };  
}

To get the list of all elements of iframe,

var doc1 = $('#page1').get(0).contentDocument; // page1 is id of iframe element
var list1 = doc1.getElementsByTagName('*');
console.log(list1.length);                     // Printing correctly
var index = prompt("Enter element index");
var elem1 = list1[index];
var pos1 = getElementPosition(elem1);
console.log("Positions:" + pos1.x + " " + pos1.y);

But this is not working. Initially elem is not null but elem.offsetParent is null in every case. Am i doing some wrong ?

For some elements, it is working fine. But for some elements, offsetParent is coming null and so their offsetLeft is 0 and offetTop is 0.

Is there any other way to find out position of each element.

Thanks in advance..

Answer 1

You already appear to be using jQuery. Why not let jQuery do the heavy lifting for you?

http://api.jquery.com/position/

http://api.jquery.com/offset/