// functions that return true or false indicating validity of a specific 

// type of input 

//

// to use, call the function and pass it input.

// 

// document.myForm.onSubmit = function() {

//	if (!isValidPhoneNumber(document.myForm.phone_number.value)) {

//		alert("the phone number you entered sucks!");

//		return false;

//	}

//	return true;

// }



function validateForm(form){

	if (!isValidEmailAddress(form.emma_member_email.value)) {

		alert("Please enter a valid email address!");

		return false;

	}

	

	if(form.emma_member_name_first.value == null || form.emma_member_name_first.length < 1 || form.emma_member_name_first.value == ""){

		alert("Please enter your first name");

		return false;

	}

	

	if(form.emma_member_name_last.value == null || form.emma_member_name_last.length < 1 || form.emma_member_name_last.value == ""){

		alert("Please enter your last name");

		return false;

	}

	

    if(form.ZipCode.value == null || form.ZipCode.length < 1 || form.ZipCode.value == ""){

		alert("Please enter your Zip Code");

		return false;

	}

	

		if(form.emma_security_code.value == null || form.emma_security_code.length < 1 || form.emma_security_code.value == ""){

		alert("Please enter a security code!");

		return false;

	}	

	

	

	return true;

}



function isValidPhoneNumber(s) {

	var temp = s.replace(/\D/g, "")

	return temp.length > 9 && temp.length < 26

}



function isValidZipCode(s) {

	var temp = s.replace(/\D/g, "")

	return temp.match(/^\d{5}$|^\d{9}$/) != null

}



function isValidSelectBox(o) {

	return (o.options[o.selectedIndex].value != "_none_" && 

			o.options[o.selectedIndex].value.trim() != "")

}



function isValidEmailAddress(s) {

	var temp = s.replace(/\s/g, "")

	return (temp.match(/^[\w\.\-]+\x40[\w\.\-]+\.\w{3}$/)) && 

			temp.charAt(0) != "." && !(temp.match(/\.\./))

}

	

	

	





// masking functions - attempt to parse and reformat 

// element's values as a specific datatype

// to use, tack them to the form field's onblur handler.

// document.myForm.phone_number.onblur = phoneFieldBlurHandler	

//   -> this field will now mask for phone numbers onblur

function textFieldBlurHandler() {

	this.value = this.value.trim()

}



function dateFieldBlurHandler() {

	var d = new Date(this.value)

	if (!isNaN(d)) {

		// if the user didn't specify the century/millenium,

		// then assume the present.

		if (this.value.search(/\d{3}/) == -1) 

			d.setYear(Math.floor((new Date()).getFullYear() / 100) * 100 + d.getFullYear() % 100);



		this.value = d.getHumanDateString()

	}

}



function timeFieldBlurHandler() {

	var t = new Time(this.value)

	if (!isNaN(t)) this.value = t.getHumanTimeString()

}



function phoneFieldBlurHandler() {

	var temp = this.value.replace(/\D/g, "")



	if (temp.length > 9 && temp.length < 26)

		if (temp.length == 10) {

			this.value = "(" + temp.substring(0,3) + ") " 

			this.value += temp.substring(3,6) + "-" + temp.substring(6,10)

		}

	}



function zipcodeFieldBlurHandler() {

	var temp = this.value.replace(/\D/g, "")



	if (temp.length == 5 || temp.length == 9) { 

		if (temp.length == 5) this.value = temp

		else this.value = temp.substring(0,5) + "-" + temp.substring(5,9)

	}

}





// convenience function.

// attaches textFieldBlurHandler to the onblur event 

// of every text or textarea element in f

// var myForm = document.myForm

// attachAllTextHandlers(myForm) 

//		-> every text element in myForm now will call 

//		   textFieldBlurHandler (above) onblur

function attachAllTextHandlers(f) {

	var el

	for (var i = 0; (el = f.elements[i]); i++) {

		if (el.type == "text" || el.type == "textarea") 

			el.onblur = textFieldBlurHandler

	}

}













// as convenient a place as any to store this...

var STD_ERROR_PREFIX = "There were one or more problems with the form values "

STD_ERROR_PREFIX += "you entered.\nPlease check the following and try submitting "

STD_ERROR_PREFIX += "the form again:\n\n"











// Extensions to the Date class:

// var myDate = new Date();

// myDate.getMonthName(); -> "February"

// myDate.getHumanDateString(); -> "February 29, 2000"

// myDate.getHumanTimeString(); -> "4:00 pm"





// returns the name of the month

Date.prototype.getMonthName = function() {

	return ["January","February","March","April","May","June","July","August",

			"September","October","November","December"][this.getMonth()]

}





// returns a nicely formatted date string

Date.prototype.getHumanDateString = function() {

return this.getMonthName() + " " + this.getDate() + ", " + this.getFullYear()

}





// returns a nicely formatted time string

Date.prototype.getHumanTimeString = function() {

	var h = this.getHours()

	var m = this.getMinutes()

	var t = h >= 12 ? "pm" : "am"



	if (h == 0) h = 24

	if (h > 12) h -= 12

	h = String(h)

	m = String(m)

	if (m.length == 1) m = "0" + m



	return h + ":" + m + " " + t

}











// Time is a wrapper class for the Date object

// it accepts a wide variety of strings representing the time

// and returns a date object representing the current date with the

// specified time.

//

// var myTime = new Time('4p');

// myTime now contains a date object representing today at 4PM.

//

// accepted formats include 4p, 4:p, 4:1p, 4:10p, 4:10pm, 16:00, 

// and a bunch more...

/*

function Time(sTimeStr) {

	var a = sTimeStr.match(/(\d{1,2})\s*\x3A?\s*(\d{0,2})\s*(am|pm|a|p)?/i)

	if (a) {

		var d = new Date()

		var h = a[1]

		var m = a[2]

		var t = a[3]

		if (t && t.charAt(0).toLowerCase() == "p") h = h % 12 + 12

		d.setHours(h)

		d.setMinutes(m)

		return d

	}

	return null

}

*/

function Time(sTimeStr) {

	if (sTimeStr.trim() != "")

	{

		var a = sTimeStr.match(/\d{1,2}/g)

		var t = sTimeStr.match(/(am|pm|a|p)/ig)

		if (a) {

			var d = new Date()

			var h = a[0]

			var m = a[1] ? a[1] : 0;

			if (t) t = String(t[0]);

			if (t && t.charAt(0).toLowerCase() == "p") h = h % 12 + 12

			d.setHours(h)

			d.setMinutes(m)

			return d

		}

		return null

	}

}









// Extensions to the String class:

// var myStr = "  yomomma.mpg "

// myStr.trim() -> myStr now contains "hotdogs!"

// myStr.hasFileExtension(".mpg") -> true





// like Trim( ) in vbscript. removes trailing and 

// leading whitespace from a string

String.prototype.trim = function() {

	return this.replace(/^\s*|\s*$/g, "")

}





// determines whether or not a filename has one of the specified extensions

String.prototype.endsWith = function() {

	var bOk = false

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

		if (this.indexOf(arguments[i]) == this.length - arguments[i].length) {

			bOk = true

			break

		}

	}

	return bOk

}







// push is a quite useful method of arrays in newer 

// javascript implementations, but not in ie5-

Array.prototype.push = function(v) {

	this[this.length] = v

	return v

}