Webpage not updating with values entered into webpage inputbox

I use this code to enter the date into a webpage search.
My value (xxx) appears on the webpage in the correct inputbox. ( When I step through the code I can actually see the value in the right place)
The second input is a button that is supposed to execute the search based on xxx.
However, on the click command the webpage refreshes but not does search based on my value, it simply refreshes to the default (today) and the inputbox is cleared of my search value.
Any ideas on how I can make this work?

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On a related note:
This code is supposed to change how many values are shown to 100 (default is 20).
Again, the input box value is changed to my value (100, which again I can actually see the value changed to 100 in the input) but does not alter how many values are shown, it still only shows the default number.
The other option is a changing the value of a dropdown list which consists of 20,50 and 100.
The fireevent does not appear to do anything.

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Any assistance would be much appreciated.

It's impossible to say really without seeing the site, webforms (which the site is using) can be somewhat tedious.

At a guess there's a keyup/press event that does something when a value is entered into the textbox that doesn't get triggered since you're automating it.

Kyle,

Would I need to trigger this?
If so, how?

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