Answer by YellowGlue for Resizing an iframe based on content

get iframe content height then give it to this iframe

 var iframes = document.getElementsByTagName("iframe"); for(var i = 0, len = iframes.length; i<len; i++){      window.frames[i].onload = function(_i){           return function(){                     iframes[_i].style.height = window.frames[_i].document.body.scrollHeight +"px";                     }      }(i); }