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I have below CheckBox in JSP file

<input type="checkbox" name="vehicle" value="Bike"
    onclick="javascript:selectCustomers(${sessionScope.custId});">

Getting the following error:

org.apache.jasper.JasperException: customer.jsp(1419,33) According to TLD or attribute directive in tag file,
        attribute onclick does not accept any expressions

Can we not use expression language in JavaScript (in my case under onClick() Event)?

I have below CheckBox in JSP file

<input type="checkbox" name="vehicle" value="Bike"
    onclick="javascript:selectCustomers(${sessionScope.custId});">

Getting the following error:

org.apache.jasper.JasperException: customer.jsp(1419,33) According to TLD or attribute directive in tag file,
        attribute onclick does not accept any expressions

Can we not use expression language in JavaScript (in my case under onClick() Event)?

• java
• javascript
• jsp
• el

Share Improve this question Follow edited Jun 27, 2014 at 10:44 Mr. Polywhirl 48.8k1212 gold badges9393 silver badges144144 bronze badges asked Jun 27, 2014 at 10:36 user3198603user3198603 5,8361515 gold badges7878 silver badges136136 bronze badges 1

• BTW: you can remove javascript: as it is just nonsense label in this context - onclick="anything:selectCustomers();" works too. – user11153 Commented Jun 27, 2014 at 11:16

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2 Answers 2

Sorted by: Reset to default 3

When a JSP page is called, the following happens, in this order:

• Server checks to see if the .jsp has already been piled and whether or not it has changed since it was last piled.
• Server runs the jsp through the Jasper piler, which interprets the jsp into Java code, anything that is not Java (CSS, HTML, JavaScript, etc) is placed in a String.
• The Java code is piled and executed.
• The results are placed in the response and sent to the user.

So, your statement: ${sessionScope.custId} is executed before the the HTML is sent to the user, and the input of selectCustomers() function is already set to before calling it.

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For more info have a look at my another post JSP inside ListItems onclick

How to verify it?

Right click in the browser and look at the view source.

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Try below sample code that might help you.

Enclose ${...} inside the single quotes.

<c:set var="custId" value="1234" scope="session" />

Before :
<c:out value="${sessionScope.custId}"></c:out>

<input type="checkbox" name="vehicle" value="Bike"
    onclick="javascript:selectCustomers('${sessionScope.custId}');">

<c:set var="custId" value="4321" scope="session" />

After:
<c:out value="${sessionScope.custId}"></c:out>

View Source code: (Right click in browser to view it)

Before : 1234

<input type="checkbox" name="vehicle" value="Bike"
    onclick="javascript:selectCustomers('1234');">  

After: 4321

Try this:

<input type="hidden" id="custId" name="custId" value="${sessionScope.custId}">

<input type="checkbox" name="vehicle" value="Bike" onclick="javascript:selectCustomers();">

function selectCustomers(){
   var custId = document.getElementById('custId').value;
}

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