well finally i found sthg .. the problem is the div reloads when i click on the page - onkeypress, onchange, onkeydown, onkeyup doesn`t work
Code:
<html>
<body>
<script language="javascript" type="text/javascript">
<!--
//Browser Support Code
function ajaxFunction(){
var ajaxRequest; // The variable that makes Ajax possible!
try{
// 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;
}
}
}
// Create a function that will receive data sent from the server
ajaxRequest.onreadystatechange = function(){
if(ajaxRequest.readyState == 4){
document.myForm.time.value = ajaxRequest.responseText;
}
}
var ga = document.getElementById('ga').value;
var queryString = "?ga=" + ga;
ajaxRequest.open("GET", "if_exist.php" + queryString, true);
ajaxRequest.send(null);
}
//-->
</script>
<form name='myForm' action='' method='post'>
Game Account: <input type='text' id='ga' onkeypress='ajaxFunction()' /> <br />
<input type='button' value='Query MySQL' />
</form>
<div id='ajaxDiv'>Your result will display here</div>
</body>
</html>
Before you post, read our: 
