jquery change button color onclick

I have multiple buttons that I use when people answer a question. How would I get the buttons to change colors when a person clicks on the button? I do not know jquery, I have been told that it is the best thing to use for this

Here is the code I have for the html part:

<div style="text-align: center;"><span style="line-height: 18px; font-family: Arial, Helvetica, sans-serif; font-size: 24px;">In the past three months, how often have you used marijuana?<br />
<p><input type="submit" value=" Never " name="btnsubmit" id="answer" style="width: 200px;" /></p>
<p><input type="submit" value=" Once or Twice " name="btnsubmit" id="answer" style="width: 200px;" /></p>
<p><input type="submit" value=" Monthly " name="btnsubmit" id="answer" style="width: 200px;" /></p>
<p><input type="submit" value=" Daily or Almost Daily " name="btnsubmit" id="answer" style="width: 200px;" /></p>
</span></div>
<div>
<p style="text-align: right;"><a onclick="window.open(this.href,'_parent');return false;" href="/mobile/Static2.aspx"><input type="submit" value=" Next " name="btnsubmit" style="width: 100px;" /></a></p>
</div>

I am really new at coding so any kind of help would be appreciated!

$('input[type="submit"]').click(function(){
$(this).css('color','red');
});

Use class, Demo:- http://jsfiddle.net/BX6Df/

   $('input[type="submit"]').click(function(){
          $(this).addClass('red');
});

if you want to toggle the color each click, you can try this:- http://jsfiddle.net/SMNks/

$('input[type="submit"]').click(function(){
  $(this).toggleClass('red');
});


.red
{
    background-color:red;
}

Updated answer for your comment.

http://jsfiddle.net/H2Xhw/

$('input[type="submit"]').click(function(){
    $('input[type="submit"].red').removeClass('red')
        $(this).addClass('red');
});

I would just create a separate CSS class:

.ButtonClicked {
    background-color:red;
}

And then add the class on click:

$('#ButtonId').on('click',function(){
    !$(this).hasClass('ButtonClicked') ? addClass('ButtonClicked') : '';
});

This should do what you're looking for, showing by this jsFiddle. If you're curious about the logic with the ? and such, its called ternary (or conditional) operators, and its just a concise way to do the simple if logic to check if the class has already been added.

You can also create the ability to have an "on/off" switch feel by toggling the class:

$('#ButtonId').on('click',function(){
    $(this).toggleClass('ButtonClicked');
});

Shown by this jsFiddle. Just food for thought.

Use css:

<style>
input[name=btnsubmit]:active {
color: green;
}
</style>

Add this code to your page:

<script type="text/javascript">
$(document).ready(function() {
   $("input[type='submit']").click(function(){
      $(this).css('background-color','red');
    });
});
</script>

You have to include the jquery framework in your document head from a cdn for example:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js" type="text/javascript"></script>

Then you have to include a own script for example:

(function( $ ) {

  $(document).ready(function(){
      $('input').click(function() {
          $(this).css('background-color', 'green');
      }
  });


  $(window).load(function() { 
  });

})( jQuery );

This part is a mapping of the $ to jQuery, so actually it is jQuery('selector').function();