Update one iframe from another

by LW

HTML

<!-- HTML for the parent page itself -->
<iframe id="frameone" src="about:blank"></iframe>
<iframe id="frametwo" src="about:blank"></iframe>
<button onclick="onenav(0)">Change 1st frame</button>

JavaScript

var links = [
    'javascript:\'<button onclick="parent.twonav(1)">Change 2nd frame</button>\'',
    'javascript:\'Hello\''
];
var one, two;
window.onload=function() {
  one = document.getElementById('frameone');
  two = document.getElementById('frametwo');
}  

function onenav(idx) {
    one.src=links[idx];
}  

function twonav(idx) {
    two.src=links[idx];
}