Question

Can I create a link that has another link in html.
For example, I want to call an html form and the target will be the sidebar frame.
At the same time, the board frame will also go back to the previous page.

Answer 1

as steve mentioned you need a bit of javascript:
<iframe id="frame1"></iframe>
<a href="" onclick="update();return false;" >DoubleActionLink</a>
<script>
function update() {
window.open("http://www.stackoverflow.com");
parent.document.getElementById('frame1').src="http://www.w3c.org";
}
</script>

btw, you said

I want to call an html form

html form means you’ll submit something to web server…so you aren’t asking for pure html solution. Isn’t ?