function echeck(str) {

 var at = "@";
 var dot = ".";
 var lat = str.indexOf(at);
 var lstr = str.length;
 var ldot = str.indexOf(dot);
 
 if (str.indexOf(at)==-1){
  alert("Invalid e-mail!");
  return false;
 }
 if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
  alert("Invalid e-mail!");
  return false;
 }
 if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
  alert("Invalid e-mail!");
  return false;
 }
 if (str.indexOf(at,(lat+1))!=-1){
  alert("Invalid e-mail!");
  return false;
 }
 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
  alert("Invalid e-mail!");
  return false;
 }
 if (str.indexOf(dot,(lat+2))==-1){
  alert("Invalid e-mail!");
  return false;
 }
 if (str.indexOf(" ")!=-1){
  alert("Invalid e-mail!");
  return false;
 }
 return true;
}

function cstate() {
 dropdown = document.ajaxsend.country;
 statesdrop = document.ajaxsend.state;
 countryindex = dropdown.selectedIndex;
 if (countryindex != 231) {
  statesdrop.disabled = true;
  statesdrop.selectedIndex = 1;
 } else {
  statesdrop.disabled = false;
  statesdrop.selectedIndex = 0;
 }
}

function send() {

 var url = "send.php";
 var params = "ready=1";

 for (i=0; i<document.ajaxsend.elements.length; i++) {
  params = params + '&' + document.ajaxsend.elements[i].name + '=' + document.ajaxsend.elements[i].value;
 }
 
 var http = new XMLHttpRequest();
 http.open("POST", url, true);
 http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
 http.setRequestHeader("Content-length", params.length);
 http.setRequestHeader("Connection", "close");
 http.onreadystatechange = function() {
  if(http.readyState == 4 && http.status == 200) {
  // alert(http.responseText);
  }
 }
 
 if (echeck(document.ajaxsend.email1.value)) {
 
  http.send(params);

  window.document.getElementById('content').style.textAlign = "center";
  window.document.getElementById('content').style.margin = "20px";
  window.document.getElementById('content').innerHTML = "Thank you.";
  
 }
 
}