function validarLogin(idioma) {

	document.usrLogin.usrEmail.value = trim(document.usrLogin.usrEmail.value)
	document.usrLogin.usrPassword.value = trim(document.usrLogin.usrPassword.value)

	switch(idioma) {

		case "ES": palabras = new Array("Por favor, ingrese su nombre de usuario.","Por favor, ingrese su contraseņa."); break;
		case "EN": palabras = new Array("Please, input your username.","Please, input ypur password."); break;

	}

	if (document.usrLogin.usrEmail.value == "") { alert(palabras[0]) ; document.usrLogin.usrEmail.focus() ; return false; }
	if (document.usrLogin.usrPassword.value == "") { alert(palabras[1]) ; document.usrLogin.usrPassword.focus() ; return false; }

	document.usrLogin.submit();

}

// Quita espacios sobrantes
function trim(strTxt){
	var pos1 = 0;
	var pos2 = strTxt.length-1;
	var i;
    for (i=0; i<strTxt.length; i++){
		if (strTxt.charAt(i) == ' ') pos1 = pos1 + 1;
		else break;
	}
	if (pos1 != (pos2+1))
		for (i=strTxt.length-1; i>0; i--){
			if (strTxt.charAt(i) == ' ') pos2 = pos2 - 1
			else break;
		}
	return strTxt.substring(pos1,pos2+1);
}