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

var http = createRequestObject();

function sendemail() {
	var comments = document.contactform.comments.value;
	var name = document.contactform.name.value;
	var email = document.contactform.email.value;
	document.contactform.send.disabled=true; 
	document.contactform.send.value='Sending....';

		http.open('POST', 'form_processor.php','true');
		http.onreadystatechange = handleResponse;
		// force no-cache so browser always makes request and doesn't use cache'd results
		http.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
		// tell server this is a form submission
		http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		http.send('comments='+comments+'&name='+name+'&email='+email+'&action=send');
}

function handleResponse() {
    if(http.readyState == 4){
        var response = http.responseText;
        var update = new Array();

        if(response.indexOf('|' != -1)) {
            update = response.split('|');
            document.getElementById(update[0]).innerHTML = update[1];
         		document.contactform.send.disabled=false; 
						document.contactform.send.value='Whoops! Try sending again...';
        }
    }
}