function enviaLogin(){
	user = document.getElementById('user').value;
	pwd = document.getElementById('pwd').value;
	if((user=="")||(pwd =="")) $('#campos_obligatorios').fadeIn("slow");
	else document.getElementById('formlogin').submit();
	
}


//	prototipo htmlentity en javascript
String.prototype.htmlEntities = function () {
   return this.replace(/&/g,'_AMP_').replace('>','_GRAN_').replace('<','_PETIT_').replace(/[+]/g,'_PLUS_').replace(/#/g,'_ALMO_');
};