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Editorial Team
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Asked: 2026-05-29T10:32:12+00:00

I have the following code: <html><body> <script type=text/javascript> function date1(){ ???? alert(<%=d%>);}</script> <input type=button

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I have the following code:

<html><body>
<script type="text/javascript"> function date1(){
    ????
    alert(<%=d%>);}</script>
<input type="button" value="date" onclick="date1()"/>
</body></html>

Instead of the ????, what will present the current date each time I’ll push the button?

  1. <%String d = (new Date()).toString())%>
  2. <%String d = "new Date()"%>
  3. <%= Date d = new Date() %>;
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1 Answer

  1. Editorial Team

    Since this is homework I’ll give you an explanation without explicitly stating which option is correct:

    Remember that any server-side Java code will run only at the point when the JSP is requested/served, essentially producing text that will be output to the browser. The code in the line with the alert:

    alert(<%=d%>);

    Will output the contents of the server-side (Java) d variable between the parentheses of the alert statement. So the correct answer is whichever one will get a new JavaScript date each time the button is clicked, so you need to work out which one results in this output to the browser:

    alert(new Date());

    Only one of the answers does that.

    Note: if you can’t figure it out, try actually running the code with each answer and see which works. I think you’ll find that one of the answers produces invalid JavaScript, one produces a server-side compilation error, and the other works.

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