function CheckForm(form)
{
	// Validate Name is not blank.
	if (form.Name.value == "") {
		alert( "Please enter value for Name." );
 		form.Name.focus();
		return false;
	}
	
	// Validate Email is not blank.
	if (form.Email.value == "") {
		alert( "Please enter value for Email." );
 		form.Email.focus();
		return false;
	}
	
	// Validate Subject is not blank.
	if (form.Subject.value == "") {
		alert( "Please enter value for Subject." );
 		form.Subject.focus();
		return false;
	}
	
	// Validate Name is not blank.
	if (form.Message.value == "") {
		alert( "Please enter value for Message." );
 		form.Message.focus();
		return false;
	}
	
	// Check if email values are the same.
	if (form.Email.value != form.ConfirmEmail.value) {
		alert( "Please correct your email address." );
 		//form.Synopsis.focus();
		return false;
	}
	
	// Check if email address is right format.
	if (! isValidEmail(form.Email.value, true)){
		alert( "Invalid Email address." );
		form.Email.select();
		form.Email.focus();
		return false;
	}
}

function isValidEmail(email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    }
	
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}