TalkPHP - how would i echo this javascript variable

i'm trying to echo this variable to the screen

Code:

thumbs = document.getElementById("thumbnailPane").getElementsByTagName("img");

the way i am echoing the value out is i have a div named output so i did

Code:

document.getElementById('output').innerHTML = 'field: ' + thumbs;

but when i did that i get this

Code:

field: [object HTMLImageElement]

is there another way of doing it?

here is the whole peice of js code i'm using if ur interested.

Code:

window.onload = initPage;



function initPage() {

  

  thumbs = document.getElementById("thumbnailPane").getElementsByTagName("img");



  

  for (var i = 0; i < thumbs.length; i++) {

    image = thumbs[i];

        

        //myoutput:

        document.getElementById('output').innerHTML = 'field: ' + thumbs;



    image.onclick = function() {

    

      detailURL = 'images/' + this.title + '-detail.jpg';

      document.getElementById("itemDetail").src = detailURL;

          

      getDetails(this.title);

          

    }

  }

}

i also tried doing thumbs[i] and echoing the image variable but it shows the same output.