Pass html data to struts action

Question

There is a user registration page where in a login-name is required. I have a "Check if loginame is available" link (Typical web-sites have such facility).
Now,for this scenario i am still not submitting the form and only need to pass the login-name text value to the appropriate (Struts) action class where further business logic is implemented and return a status whether its available or not.
How do i go about passing the value of the jsp page to Java.
Regards,
Gyan

Answer 1

ragh_dr wrote:
So, you have two separate Action classes for login and check login name? What you could do is call a javascript method on clicking the link (onclick="javascript:checkLoginName();"). In this method, get the value of the user entered login name and pass it to your check login Action either as a query string (document.forms[0].action="/CheckLoginName.do?loginId=userentered") and submit the form. You can get the value of loginId from the request object in your Action class. You could also set the target of the form as new or something document.forms[0].target="_new", so that the check results are shown in a new window if required.Why would you abuse JS for this and not just let the Login class delegate/call the CheckLogin class?
About that JS, although this is not a Javascript forum and I normally don't go in detail with JS here, but I would say that using document.forms[0] is a terribly bad practice. Why should your code expect that the form you're looking for is always the first form element of the document? Just use document.formname or document.getElementById() or if you're smart, the 'this' reference.