thanks Manish.

<bean:define id="userProp" name="addUserForm"
property="userPropositions"  />
        <html:select property="selProposition" multiple="true"
name="addUserForm" onchange="showProposition()">
        <html:iterate name="addUserForm" property="userProp"
id="userAssociatedPropositions">
        <html:present name="addUserForm" parameter="Proposition">
        <html:options collection="userProp" labelProperty="label"
property="value"/>
        </html:select>

Let me know how to use the Parameter in html:present.

The arraylist that has the values has been converted into a string[]
that struts supports fro multiple selection.

i found in one of the mail archieves in google that

<bean:define id="userProp" name="addUserForm"
property="userPropositions"  />

           <html:select property="selProposition" multiple="true"
name="addUserForm" onchange="showProposition()">

           <html:options collection="userProp" labelProperty="label"
property="value"/>

           </html:select>

will work for multiple selection.

kindly help.

thanks in advance.

Vasu