function formSubmit(frm) {

	if (isEmpty(frm.txtFirstName, "First Name")) return

	if (isEmpty(frm.txtLastName, "Last Name")) return

	if (isEmpty(frm.txtContactNum, "Contact Number")) return

	if (isEmpty(frm.txtEmail, "Contact e-mail")) return

	if (notEmail(frm.txtEmail, "Contact e-mail")) return

	//if (isEmpty(frm.taAddress, "Address")) return

	//if (isEmpty(frm.txtState, "State/Province")) return

	//if (isEmpty(frm.txtPostCode, "Postal/Zip Code")) return

	if (isEmpty(frm.txtHotelName, "Hotel Name")) return

	if (isEmpty(frm.txtRoomType, "Room Type")) return

	if (isEmpty(frm.txtCardHolder, "Card Holder")) return

	if (isEmpty(frm.txtCardNum1, "Credit Card Number")) return

	if (isEmpty(frm.txtCardNum2, "Credit Card Number")) return

	if (isEmpty(frm.txtCardNum3, "Credit Card Number")) return

	if (isEmpty(frm.txtCardNum4, "Credit Card Number")) return

	if (isEmpty(frm.txtCardValidNo, "Card Validation Number")) return

	if (isChecked(frm.chkTerms, "Terms & Conditions")) return



	//submit form

	frm.submit()	

}





function isEmpty(field, fieldName) {

	if (trim(field.value) == "") {

		alert("Please enter " + fieldName + ".");	

		field.focus()

		return true

	}

	return false

}





function isChecked(field, fieldName) {

	if (!field.checked) {

		alert("Please agree on the \"" + fieldName + "\" before proceeding further.");	

		field.focus()

		return true

	}

	return false

}





function notEmail(field, fieldName) {

	var email = trim(field.value)



	if (email == "") return false



	var at = false

	var dot = false



	for (var i=0; i<email.length; i++) {

		if (email.charAt(i) == "@") at = true

		if (email.charAt(i) == "." && at) dot = true

	}



	if (!(at && dot && email.length > 5)) {

		alert("The " + fieldName + " you entered is not a valid e-mail address.")

		field.focus()

		field.select()

		return true

	}



	//check for invalid characters

	if (invalidChars(field, fieldName, ',;|\'" <>\\/')) return true



	return false

}



function invalidChars(validatedControl, validatedName, charString) {

	var validatedString = trim(validatedControl.value).toLowerCase()

	charString = charString.toLowerCase()



	for (var i=0; i<validatedString.length; i++) {

		for (var j=0; j<charString.length; j++) {

			if (validatedString.charAt(i) == charString.charAt(j)) {

				var alertString = charString.split("").join("  ")

				alertString = alertString.split("     ").join("  space  ")

				alert(validatedName + " cannot contain any of the following\nillegal characters:\n\n " + alertString)

				validatedControl.focus()

				validatedControl.select()

				return true

			}

		}

	}



	return false

}



function trim(stringToTrim) {

	var trimmedString = ""



	//left trim

	for(var i=0; i<stringToTrim.length; i++) {

		if (stringToTrim.charAt(i) != " ") break

	}



	trimmedString = stringToTrim.substring(i)



	//right trim

	for(var i=trimmedString.length-1; i>=0; i--) {

		if (trimmedString.charAt(i) != " ") break

	}



	trimmedString = trimmedString.substring(0, i + 1)



	return trimmedString

}