// JavaScript Document

function setAttributes(){
	
	// Restricciones
	setOnlyLetters(["NOMBRE"]);
	setOnlyLetters(["PATERNO"]);
	setOnlyLetters(["MATERNO"]);
	setOnlyNumbers(["CP"]);
	setOnlyMail(["EMAIL"]);
	setOnlyLettersNumbers(["NOTA"]);
	setOnlyTelephones('LadaCasa','TelCasa');
	setOnlyTelephones('LadaCel','TelCel');
	
	// Requeridos	
	setRequired("EMAIL");	
	setRequired("NOMBRE");
	setRequired("PATERNO");
	setRequired("MATERNO");					
	setRequired("ID_CURSO");	
	setRequired("ID_PERIODO");
	
	// MaxLength �rea de Texto	
	setMaxLength();

}

function joinHomePhone(){
	document.mainForm.TEL_CASA.value=document.mainForm.LadaCasa.value + document.mainForm.TelCasa.value;
}
function joinCellPhone(){
	document.mainForm.TEL_CEL.value=document.mainForm.LadaCel.value + document.mainForm.TelCel.value;
}
function validateSubmit(){

	if (REQ('mainForm') && checkTextAreaMaxLength()){
		return true;
	}else return false;
}

function setMaxLength() {
	var x = document.getElementsByTagName('textarea');
	var counter = document.createElement('div');
	counter.className = 'counter';
	for (var i=0;i<x.length;i++) {
		if (x[i].getAttribute('maxlength')) {
			var counterClone = counter.cloneNode(true);
			counterClone.relatedElement = x[i];
			counterClone.innerHTML = '<span>0</span>/'+x[i].getAttribute('maxlength');
			x[i].parentNode.insertBefore(counterClone,x[i].nextSibling);
			x[i].relatedElement = counterClone.getElementsByTagName('span')[0];

			x[i].onkeyup = x[i].onchange = checkMaxLength;
			x[i].onkeyup();
		}
	}
}

function checkMaxLength() {
	var maxLength = this.getAttribute('maxlength');
	var currentLength = this.value.length;
	if (currentLength > maxLength)
		this.relatedElement.className = 'textAreaExceeded';
	else
		this.relatedElement.className = '';
	this.relatedElement.firstChild.nodeValue = currentLength;
	// not innerHTML
}

function checkTextAreaMaxLength(){
	if ($('NOTA').value.length > $('NOTA').maxlength){
		alert('Se ha excedido el m�ximo de caract�res permitidos para el comentario adicional');
		return false;
	}else return true;
}