function isEmail(sValue){
  var isOK = true;
  var iLength = sValue.length;
  var iArr = 0;
  var iDot = 0;
  if (iLength < 6){
     isOK = false;
     return isOK;
  }
  for (j=0; j<iLength; j++){
    if((sValue.substring(j,j+1) == "'") ||
       (sValue.substring(j,j+1) == "*") ||
       (sValue.substring(j,j+1) == "%") ||
       (sValue.substring(j,j+1) == ",") ||
       (sValue.substring(j,j+1) == "&") ||
       (sValue.substring(j,j+1) == "/") ||
       (sValue.substring(j,j+1) == "$") ||
       (sValue.substring(j,j+1) == "=") ||
       (sValue.substring(j,j+1) == "#") ||
       (sValue.substring(j,j+1) == "?") ||
       (sValue.substring(j,j+1) == "¿") ||
       (sValue.substring(j,j+1) == "<") ||
       (sValue.substring(j,j+1) == ">") ||
       (sValue.substring(j,j+1) == "\"")) {
      isOK = false;
     }
     if (sValue.substring(j,j+1) == "@") iArr += 1;
     if (sValue.substring(j,j+1) == ".") iDot += 1;
  }
  if (iArr != 1) isOK = false;
  if (iDot < 1) isOK = false;
  return isOK;
}

function CheckForm(){
  var xMsg = "";
  if (!isEmail(document.frmContact.txtEmail.value)) xMsg += "\nEmail Address";
  if (document.frmContact.txtPhone.value == "") xMsg += "\nPhone Number";
  if (xMsg == ""){
    document.frmContact.submit();
  }else{
    alert("Please fill following fields before to continue:\n" + xMsg);
  }
}

function GoContact(){
  window.location.href="ContactUs.asp";
}