var xmlhttp;

function showUser(str, prod_id, cust_id)
{
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null)
	{
		alert ("Browser does not support HTTP Request");
		return;
	}
		
	if (str.checked == 1){
		var url="update_notifications.php";
		url=url+"?product_id="+prod_id +"&customer_id="+cust_id+"&checked=1";
	}
	else{
		var url="update_notifications.php";
		url=url+"?product_id="+prod_id +"&customer_id="+cust_id+"&checked=0";
	}
	
	xmlhttp.onreadystatechange=stateChanged;
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);

}

function stateChanged()
{
	if (xmlhttp.readyState==4)
	{
		document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
	}
}

function GetXmlHttpObject()
{
	if (window.XMLHttpRequest)
	{
		// code for IE7+, Firefox, Chrome, Opera, Safari
		return new XMLHttpRequest();
	}
	if (window.ActiveXObject)
	{
		// code for IE6, IE5
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
	return null;
}