I have read about the possibility to change the required attrib of fields using a check box and have not been too successful with it probably due to my limited understanding of jscript (or the fact we use radio buttons to limit the number of selections more than checkboxes).  But my question is:  Is it possible to use a CSS class to determine that a field with said class is required if unhidden but not required if hidden without the use of a checkbox or radio button?  If so can someone help me with the code?