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 sndEmail(mail,candidate_name){

        var text=document.getElementById('email_text').value;
        var str = 'email_save_text=1&text='+text+'&mail='+mail+'&candidate_name='+candidate_name;
        var url = 'http://www.EnglishTeachingKorea.com/control_panel.php';

        http.open('POST',url,true);
        http.onreadystatechange = handleResponse;
        http.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
        http.send(str);
}