//##########################################
function checkForm(frm)
{
	var msg = "";
	
	if(frm.name.value == "")
		msg += "\n   Your name     ";
	if(frm.email.value == "" || (!isEmail(frm.email.value)))
		msg += "\n   A valid email address     ";
	if(frm.telephone.value != "" &&  (!is_number(frm.telephone.value)))
		msg += "\n   A valid telephone number     ";
 if(frm.message.value == "")
 	msg += "\n   Your message!     ";
	
	if(msg != ""){
		alert("Please supply the following:     \n" + msg);
		return false;
	}else{
		return true;
	}
}

//######################################
function testInput(mode) {
	// Initialise
	document.inputForm.ReturnURL.value = "http://www.jerramgallery.com/signup-thanks.php";
	var Email =  new String(document.inputForm.Email.value); 
	if(mode == 'unsubscribe')
		document.inputForm.ReturnURL.value = "http://www.jerramgallery.com/signup-thanks.php?unsub=true";
	document.inputForm.Mode.value = mode;
	//return;
	var frm = document.inputForm;
	var msg = "";
	
	if(frm.Col2.value == "")
		msg += "\n   Your first name     ";
	if(frm.Col3.value == "")
		msg += "\n   Your last name     ";
	if(frm.Email.value == "" || (!isEmail(frm.Email.value)))
		msg += "\n   A valid email address     ";
	if(frm.Col11.value != "" &&  (!is_number(frm.Col11.value)))
		msg += "\n   A valid telephone number     ";
	
	if(msg != ""){
		alert("Please supply the following:     \n" + msg);
		return;
	}else{
		document.inputForm.submit();
	}

}

var image1 = new Image;
var image2 = new Image;
var image3 = new Image;
var image4 = new Image;
image1.src = "images/b-unsubscribe1.gif";
image2.src = "images/b-unsubscribe2.gif";
image3.src = "images/b-subscribe1.gif";
image4.src = "images/b-subscribe2.gif";

//###########################################
function swap(img, newImage)
{
	img.src = newImage.src;
}

//####################  TELEPHONE FUNCTION  #########
function is_number(num)
{
	var supported = 0;
  if (window.RegExp) {
 		var r1 = new RegExp("[^0-9 ]");
		return (!r1.test(num))
  }
}

//####################  EMAIL FUNCTION  ###############
function isEmail(str) {
  // are regular expressions supported?
  var supported = 0;
  if (window.RegExp) {
    var tempStr = "a";
    var tempReg = new RegExp(tempStr);
    if (tempReg.test(tempStr)) supported = 1;
  }
  if (!supported) 
    return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
  var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
  var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,4}|[0-9]{1,4})(\\]?)$");
  return (!r1.test(str) && r2.test(str));
}