How can I program a form to submit multiple queries and show each response in a different frame?
onClick event handler can be used to control many aspects of form submission. For example, the following code might be used to submit the same form data to two different servers:
In this example, before each invocation of the form’s
submit method, the
action property is defined so that each call to the
submit method sends the query data to a different server. Similarly, the
target property is configured so that the the servers’ responses are shown in separate frames. This event handler code returns a
false value to prevent the interpreter from submitting the form a third time. (Of course, we could also have omitted both the second
submit call and the
return statement to achieve the same result.)
Internet Explorer 3.0 fails because it does not support assignment to the
target properties. Netscape Navigator 3.0 supports the assignment but does not properly handle multiple calls to the
submit method, because Netscape does not issue the HTTP request until after the interpreter has returned from the event handler. As a result, only the last in a series of calls to the submit method works correctly.
Not all is lost; there are probably many ways to work around this problem. For example, if you have any control over the contents returned by the servers you are querying, you might be able to include an
onLoad event handler with the first server’s response, so that when it is loaded, it resubmits the form to the second server. This is a rather difficult kludge, but it is possible.