function createRequest() {
	var obj;
	var browser = navigator.appName;
	if(browser == "Microsoft Internet Explorer"){
        obj = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        obj = new XMLHttpRequest();
    }
    return obj;
}

var twlohaxmlhttp = createRequest();

/***********************************************************
* make product item live 
***********************************************************/
function join() {
	email = document.getElementById('email').value
	twlohaxmlhttp.open('get','ajax.php?email='+email);
	twlohaxmlhttp.onreadystatechange = joinResponse;
   	twlohaxmlhttp.send(null);
}
function joinResponse() {
	if(twlohaxmlhttp.readyState == 4){
		// this is the content of the called page
        var response = twlohaxmlhttp.responseText;

       	//process the response
       	if( response ) {
       		var r = response.split("|");
       		document.getElementById('email').value = 'email address';
	       	alert("Thanks for joining us!");
       	}
       	else {
       		//alert('There are already 4 commodity items that are showing on the home page.');
       	}
    }
}