how to disable buttons based on a condition in jsp?

Question

how can I disable a button by checking a condition in my jsp? If true,then the button is enabled,if false,then the button is disabled. The condition would be checking the va

Answer 1

Or simply you could do it using el directly like this:

<input type="button" ${ condition ? 'disabled="disabled"' : ''}/>

As an example:

<input type="button" ${ someVariable eq 5  ? 'disabled="disabled"' : ''}/>

Answer 2

Try using JSTL construction like this:

<input type="button" <c:if test="${variable == false}"><c:out value="disabled='disabled'"/></c:if>">

For more examples see http://www.ibm.com/developerworks/java/library/j-jstl0211/index.html

Answer 3

My approach would be something like this:

 <c:choose>
    <c:when test="${condition == true}">
      <input type="button" disabled="disabled"/>
    </c:when>
    <c:otherwise>
      <input type="button" />
    </c:otherwise>
 </c:choose>

Answer 4

If you use Spring's form tag library, you could also write:

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

<form:form>
 ...
 <form:button type="button" disabled="${condition}">Name of button</form:button>
</form:form>