Javascript og PHP: hente data fra en database

Jeg har et script til at autocomplete en input box med.

Mit spørgsmål er nu, hvordan får jeg hentet noget data fra en database ind i variablen "emails", gerne via noget php

<script src="js/mobrowser.js"></script>
<script src="js/modomevent.js"></script>
<script src="js/modomt.js"></script>
<script src="js/modomext.js"></script>
<script src="js/tabs2.js"></script>
<script src="js/getobject2.js"></script>
<script src="js/xmlextras.js"></script>
<script src="js/acdropdown.js"></script>
        <!-- syntax highlight -->
<script language="javascript" src="js/shCore.js" ></script >
<script language="javascript" src="js/shBrushXML.js" ></script >
<!-- syntax highlight -->
<script language="javascript">
var emails = new Array( 'test', 'te' )
function formatCountries( sText )
{
return sText.substr( 0, sText.toLowerCase().indexOf( this.sActiveValue.toLowerCase() ) ) + sText.substr( sText.toLowerCase().indexOf( this.sActiveValue.toLowerCase() ), this.sActiveValue.length ).bold().fontcolor( '#ff0000' ) + sText.substr( sText.toLowerCase().indexOf( this.sActiveValue.toLowerCase() ) + this.sActiveValue.length )
}
function alertSelected()
{
document.getElementById( 'selectedCountry' ).innerHTML = this.sActiveValue
}
/* TOGGLE CODE */
function toggleCode( hEvent )
{
cDomEvent.init( hEvent )
var hLink = cDomEvent.target
var hREX = new RegExp( 'codeblock:(.*)', 'ig' )
hLink.getAttribute( 'target' ).match( hREX )
var sBlockId = RegExp.$1
var hCodeBlock = document.getElementById( sBlockId )
hCodeBlock.style.display = hCodeBlock.style.display == 'block' ? 'none' : 'block'
hLink.blur()
return false
}
function attachToggleCode( hLink )
{
hLink.onclick = toggleCode
hLink.className = 'codeToggle'
}
cDomExtensionManager.register( new cDomExtension( document, [ 'a[target*=codeblock]' ], attachToggleCode ) )
function onLoadInit()
{
dp.SyntaxHighlighter.HighlightAll('code')
}
cDomEvent.addEvent( window, 'load', onLoadInit )
</script>