Javascript Validator

sorry, again with this problem, but it's urgent this time and I haven't got my programmer friend who put it together for me to help so i'm stumped!

This form I have has a validator and that part is all working, so that's good, but while I was testing I didn't have it actually submitting and now that I've added the action and the email address to send it to I realise it doesn't even send..

I think it's actually lacking anythign that tells it to send. im using a regular button instead of a submit button. i just need to know where to put the 'submit' function and how!



here is the HTML for the form:

		  <form id="form1" name="form1" method="post" action="http://mailgate.server-mail.com/cgi-bin/mailgate"> 
		  <input type=hidden name="recipient" value="mail@domain.com">
          <input type=hidden name="subject" value="Radio Survey">
                    
        
			<input type="radio" name="Group1" value="3AW" />3AW<br>
               <input type="radio" name="Group1" value="2GB" /> 2GB <br>
               <input type="radio" name="Group1" value="None" />N/A, I didn't hear your ad</p>
                <input name="button" type="button" onclick="(doValidate() ? hideModal() : showModal());" value="Submit">
                  </form>

here is the javascript

<script language="javascript" type="text/javascript">

    //setup initial modal properties
    var modal = document.getElementById('modalWdw');
 
   
    function showModal()
    {
       modal.style.display='block';
    }

    function hideModal()
    {
       modal.style.display='none';
       return true;
    }
	
	function doValidate()
	{
		var group1Checked;

		for (var i=0; i<document.getElementsByName('Group1').length; i++)
		{
	
			if (document.getElementsByName('Group1')[i].checked)
			{
				group1Checked = document.getElementsByName('Group1')[i].value;
			}
		}

	
		if(!group1Checked)
		{ //if group1Checked does not equal null
			alert("You did not make a selection.")
		}
		else
		{
			alert('Thankyou, your selection was: ' + group1Checked);
			return true;
		}
	}	

	showModal();
	

function checkOnLoad()
//essentially, this function just scans the current page url and looks
//  for the querystring (after the '?'), then checks to see if "modal=true"
//  was included as a querystring key-value pair
{
    var arr = window.location.href.split(/\?/g);
    if (arr.length >= 2)
    {
       var vals = arr[1].split(/=/g);
       if (vals.length >= 2)
       {
          for (var i = 0; i<vals.length; i++)
          {
             if (vals[i] == 'modal')
             {
                if (vals[i+1] == 'true')
                {
                   return true;
                }
             }
          }
       }
    }
    else
    {
       //no modal
       hideModal();
    }

    return false;
}

(checkOnLoad() ? showModal() : hideModal());

</script>

all that modal=true stuff is to show or hide the div in which the form is in, it only shows if the page is directed from a certain address, and it only disappears if the form is validated.

Can anyone see where I need to insert something to make the form actually SEND to the email adress?
All it seems to do onclick is check to see if it is validated..