############################
html file
############################
 
 
<script language=javascript>
 
	var xmlHttp_1 = null;
	var objDiv_1 = null;
	var htmlContents_1 = null;
 
	function createXMLHttpRequest_1() {
		if (window.ActiveXObject) {
			xmlHttp_1 = new ActiveXObject("Microsoft.XMLHTTP");
		} 
		else if (window.XMLHttpRequest) {
			xmlHttp_1 = new XMLHttpRequest();
		}
	}
 
	function handleStateChange_1() {
 
		if(xmlHttp_1.readyState == 4) {
			if(xmlHttp_1.status == 200) {
				htmlContents_1 = xmlHttp_1.responseText;
				objDiv_1.innerHTML = htmlContents_1;
			}
		}
	}
 
 
 
	function getContents_1(url, divv) {
 
			objDiv_1 = document.getElementById(divv);
 
			createXMLHttpRequest_1();
			xmlHttp_1.onreadystatechange = handleStateChange_1;
 
			xmlHttp_1.open("GET", url, true); 
			xmlHttp_1.send(null);
	}
 
	function send(name, layer) {
		getContents_1("./idchk.php?id="+name,layer);
	}
 
</script>
 
 
<form>
	<input name=n type=text size=10>
	<input type=button value=Input onClick=send(this.form.n.value,'layer1')>
</form>
 
<!-- result -->
<div ID="layer1"></div>
 
 
 
############################
php file (idchk.php)
############################
 
<?
 
 
	echo "You can use <b>".$_GET['id']."</b>";
?>