Passing input value from parent window to popup window

I had made开发者_如何学C a parent window that includes a text box and hyperlink to open a PopUp Child JSP Page.

I wish to access the value entered in textbox on the Child JSP through request.getParameter method. How can I achieve this?

Just pass the value along as querystring in the URL of the popup window.

Assuming that you've a

<input type="text" id="foo">

you can pass it to the popup window as follows

var foo = document.getElementById('foo').value;
window.open('child.jsp?foo=' + encodeURIComponent(foo));

then you can access it in popup window as follows

<p>The value is ${param.foo}</p>