Well, the disabledfeature is intended to actually signal that the slider won't work.
But there's a rather simple workaround: Set the minimum and maximum position of the slider to the same value. Then respondents won't be able to move the slider, although it's technically not disabled... Does'nt work for multiple slider items in a question with different values, of course.
Well ... not convinced? I am not, either. So, we modified the disabled feature a bit. It now accepts a value for the opacity:
<script type="text/javascript">
SoSciTools.attachEvent(window, "load", function() {
var slider = SoSciSliders.getSlider("SB02_01");
slider.value = 80;
slider.disabled = 1.0;
});
</script>