Method of element identification and emulation of click event

[ZZyZX]

I wish to uniquely identify the below button element embedded
among many other button elements in a web page and call the click
event on it to automatically navigate to the next page in a
sequence of pages. Similar in action to automated login.

<INPUT class=submitn onclick="window .location='/newstuff?
newstuffupdate= prefs&amp;type= cfilter&amp;ind ex=1&amp;from=z zyzx'"
type=button value="Search Now">


Since the above button element has no id or name tag I can't see
any way of success with;
var tag=document.ge tElementById("f oo").click()" ;

Also, if it matters, this input element and many others of the
class=submitn are not wrapped in a <form</formblock, they do
all reside in a <div</divblock.

http://www.javascriptkit.com/domref/documentmethods.shtml

does have a close approximation of what could be used.

Under heading - getElementsByNa me(name)

<div name="george">f </div>
<div name="george">f </div>

<script type="text/javascript">
var georges=documen t.getElementsBy Name("george")
for (i=0; i< georges.length; i++)
// do something with each DIV tag with name="george". Firefox only.
</script>

but the above still leaves the identification of the input
button unsolved.

Any insights or suggestions?

[ZZyZX]

Re: Method of element identification and emulation of click event

It should be added that the client browser is written in java with IE
engine embedded in a java ContentPane. The client user may inject into
any rendered webpage any javascript that a user may wish as though the
injected script were part of the original downloaded webpage.