function entrada(){
	if (document.form_campus.usuario.value == ""){
		alert("Por favor, ingrese el nombre de usuario.");
		return false;

	}
	
	if(document.form_campus.clave.value == ""){
		alert("Por favor, ingrese la contraseņa.");
		return false;

	}
	
	abrircampus();
	return true;
}



function abrircampus(){
	var width = screen.availWidth;
	var height = screen.availHeight;
	var left = (screen.width/2) - (width/2);
	var top = (screen.height/2) - (height/2);
	//var styleStr = 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width='+width+',height='+height+',left='+left+',top='+top+',screenX='+left+',screenY='+top;
	var styleStr = 'fullscreen=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no';
	window.open("", 'campus', styleStr);


}