onclick inside iframe for a button outside iframe

Question

I am trying to find a way to initiate an onclick inside an iframe when a button outside the iframe is clicked.

The code for the onclick is included below.

<div style='float: right;'>
  <a href='javascript:void(0)' onclick ='xnaww_download()' data-tooltip-ul="Download map data of a selected region. Output data is in KML format">
</div>

Answer 1

You need to have the following script from the parent page (assuming you are using jQuery and the id of the iFrame is "iframeElement"):

 $("#iframeElement")[0].contentWindow.xnaww_download();

This will only work as long as the parent and frame are on the same domain. Otherwise you'll run into cross-domain-scripting errors!