Send the selected value in jsp custom tag as a parameter

问题

I want to send the selected value from A custom tag to B custom tag as a parameter. The value of the B custom tag depends on the value selected in the A custom tag. Please help me.....

<li>    
    <label for="classType">A</label>
    <eco:rndDtlCombo name="rndDtlNm" id="rndDtlNm" rndList="${rndList }" userId="${member.userId}"></eco:rndDtlCombo>
</li>

<li>    
    <label for="classType2">B</label>
    <eco:performCombo name="performNm" id="performNm" performList="${performList }"></eco:performCombo>
</li>

来源：https://stackoverflow.com/questions/66183041/send-the-selected-value-in-jsp-custom-tag-as-a-parameter