function chkfrm() {
if (document.frmContact.txtName.value == "")
  {
    alert("Your name is missing.");
    document.frmContact.txtName.focus();
    return false;
  }
if (document.frmContact.txtSurname.value == "")
  {
    alert("Your surname is missing.");
    document.frmContact.txtSurname.focus();
    return false;
  }
if (document.frmContact.txtEmail.value == "")
  {
    alert("Your e-mail address is missing.");
    document.frmContact.txtEmail.focus();
    return false;
  }
if (document.frmContact.txtMessage.value == "")
  {
    alert("Your message is missing.");
    document.frmContact.txtMessage.focus();
    return false;
  }
return true;
}
function RefreshImage(valImageId) {
	var objImage = document.images[valImageId];
	if (objImage == undefined) {
		return;
	}
	var now = new Date();
	objImage.src = objImage.src.split('?')[0] + '?x=' + now.toUTCString();
}