changing form post

I want to change form post data before send. i use some java script code to get some user inputs and want to 开发者_Go百科attach those to request post data. I wanna a normal post that cause to display result as a an HTML page. its may be useful that i linked JQuery and can use its functions. Thanks very much!

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You can use onSubmit event as shown below -

<form action="test.php" name="testform" onSubmit="return TestDataCheck()" >
<input type="text" value="hello" name="testinput" />
<form>

Define a function as shown below -

<script type="text/javascript">
function TestDataCheck(){

//Here do whatever you want to do with the form or it's values.
//I am changing the value of input field in the form for your reference in same way you
//can change any elements value.

$('input[name="testinput"]').val("bye");

return true.

}
</script>

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html

<form action="test.php" name="testform" id="testForm">
<input type="text" value="hello" name="testinput" />
<form>

javascript

//handle form submit
   jQuery("#testForm").submit(function(e){

      //prevent default action
      e.preventDefault; 

     //get form
     var _data=jQuery("#testForm").serialize();

     //add custom props
     _data['customProp1']='customValue1';
     _data['customProp2']='customValue2';

     //now just submit form or call ajax

    });