问如何检测jsp Calendar中的某一天何时被单击(选中)并执行一些操作？

EN

<stripes:text name="selectedDate" onchange="this.form.submit()"/>

when date picker would update an html element with the selected date.
call a function on onchange event of that element;
like

<input type="text" value="from date picker" onchange="update_date(this.value);">

function update_date(selecteDate){
if(selectedDate === "11/15/2011")
//do your need
}