title: Run MySQL Query on chnage of HTML input=text filed onchange
body: <p>What I am trying to do is when I type in in input text box to see if the value of the text box is in a DB row when text is entered in the box. </p>
  
  <pre><code>&lt;input type='text' name='barcode'&gt; 
  </code></pre>
  
  <p>have it search the db onchange of the input field to look for the value of the barcode entered and echo the results of the row on the same page as the input field. </p>
  
  <p>It looks like I have to use AJAX, but I am not familiar with that at all. </p>