Ajax PHP MYSQL on enter - php

Question

I am using the below code to search a mysql database but cannot get the form to submit when the return key is pressed.
Does anybody have any ideas?
function ajaxFunction(){
var ajaxRequest;
{
// Opera 8.0+, Firefox, Safari
ajaxRequest = new XMLHttpRequest();
} catch (e){
// Internet Explorer Browsers
try{
ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try{
ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e){
// Something went wrong
alert("Your browser broke!");
return false;
}
}
}
ajaxRequest.onreadystatechange = function(){
if(ajaxRequest.readyState == 4){
var ajaxDisplay = document.getElementById('ajaxDiv');
ajaxDisplay.innerHTML = ajaxRequest.responseText;
}
}
var kw = document.getElementById('kw').value;
var division = document.getElementById('division').value;
var queryString = "?kw=" + kw + "&division=" + division;
ajaxRequest.open("GET", "search/jsearch.php" + queryString, true);
ajaxRequest.send(null);
}
Form code is:
<form name='myForm'>
Keywords<input type='text' id='kw' /> <br />
<br />
<select id='division'>
<option value='0' selected="selected">window & door</option>
<option value="1">window</option>
<option value="2">door</option>
</select>
<input type='button' onclick='ajaxFunction()' value='Query MySQL' />
</form>

Answer 1

Where is your event code for the form? Are you using an onclick instead of onsubmit? I don't think we have enough code/information to answer this, but from what you describe your first step to make sure you are using an onsubmit event for the form so you can fire off the xhr.
EDIT:
Then the answer to this problem: "...cannot get the form to submit when the return key is pressed", is use onsubmit instead of onclick. You also need to attach the event to the form instead of the button, and if possible refrain from using inline js.
http://en.wikipedia.org/wiki/Unobtrusive_JavaScript

Answer 2

onclick fires when you click the button. You are pressing return, not clicking the button.
As mentioned earlier, you should use onsubmit which fires when the form is submitted. You will need to return false, ie use onsubmit="ajaxFunction();return false;", to prevent the normal submission from occurring.