Tool tip on Struts2 select tag options

I have select tag, options inside this is bigger one.not able to see in the drop down itself. How to see that in Tooltip?how to configure it?

<s:select cssClass="drop" list="lstEntities"
                            cssStyle="width:500px"  
                            id="select_statement" listKey="statementId"
                            listValue="conditionStat开发者_开发问答ement">
                            </s:select>

Please help on this.

Add title attribute to this tag with the tooltip you want.

<s:select cssClass="drop" list="lstEntities"
                            cssStyle="width:500px"  
                            id="select_statement" listKey="statementId"
                            listValue="conditionStatement"
                            title="toolTip text">
                            </s:select>