function numbers(event) {
	var key;
	if (window.event) {
		key = window.event.keyCode;
	} else if (event) {
		key = event.which;
	} else {
		return true;
	}
	if(key >= 48 && key <= 57 || key == 8 || key == 13|| key == 0) {
		return true;
	} else {
		return false;
	}
}

function letters(event) {
	var key;
	if (window.event) {
		key = window.event.keyCode;
	} else if (event) {
		key = event.which;
	} else {
		return true;
	}
	if(key >= 65 && key <= 122 || key==39 || key == 8 || key == 13 || key == 45 || key == 32|| key == 0) { 
		return true;
	} else {
		return false;
	}
}

function letters_single_quote(event) {
	return letters(event);
}

function letters_and_num(event) {
	var key;
	if (window.event) {
		key = window.event.keyCode;
	} else if (event) {
		key = event.which;
	} else {
		return true;
	}
//	display_key(key);
	if((key >= 65 && key <= 122) || (key >= 48 && key <= 57)|| key == 8 || key == 13 || key == 45 || key == 32 || key == 0 || key == 46) { 
		return true;
	} else {
		return false;
	}
}
/* 
101 = e
120 = x
116 = t
46 = .
*/

function phone(event) {
	var key;
	if (window.event) {
		key = window.event.keyCode;
	} else if (event) {
		key = event.which;
	} else {
		return true;
	}
	if(key >= 48 && key <= 57 || key == 8 || key == 13 || key == 45 || key == 32 || key == 40 || key == 116 || key == 101 || key == 120 || key == 46 || key == 40 || key == 41|| key == 0) { // Allow return backspace  space -()
		return true;
	} else {
		return false;
	}
}

function phone_num(event) {
	var key;
	if (window.event) {
		key = window.event.keyCode;
	} else if (event) {
		key = event.which;
	} else {
		return true;
	}
	if(key >= 48 && key <= 57 || key == 8 || key == 13 || key == 45 || key == 32 || key == 40 || key == 116 || key == 101 || key == 120 || key == 46 || key == 40 || key == 41|| key == 0) { // Allow return backspace  space -()
		return true;
	} else {
		return false;
	}
}


function key_email(event) {
	var key;
	if (window.event) {
		key = window.event.keyCode;
	} else if (event) {
		key = event.which;
	} else {
		return true;
	}
//display_key(key);
	if(key != 32) { 
		return true;
	} else {
		return false;
	}
}