Nonn so se ho capito ....


function elementDisabled(elemento, isDisabled) {
elementColor(elemento, isDisabled ? DISABLED_COLOR : ENABLED_COLOR);
if (e.type == "text" || e.type == "textarea") e.readOnly = isDisabled; else elemento.disabled = isDisabled;
return isDisabled;
}


document.form.nomecampo.isDisabled= true /false