function ge(el) {
	return (document.all)?document.all[el]:document.getElementById(el);
}
	
function gdisplay(el) {

	return ge(el).style.display;		
}

function desabilitaEnter(campo) {

	campo.onkeypress = function(e) {
		
		var tecla;
		
		if ( /msie/i.test(navigator.userAgent) ) {
			tecla = event.keyCode;
		} else {
			tecla = e.which;
		}
	
		return tecla != 13;
	}
}