JavaScript, HTML, JSP onClick statement

Question

Is there a way to use the value from a text field as the parameter value in an onclick statement for a button. For example if you have some text field named "name" and you have another button named "button" when clicked will go to the same page "page.jsp" with a parameter "par" equal to the text field value. This is what I am currently doing:

out.print("<input type = 'button' name = 'noName' value = 'Click Me' onclick =" + '"' + "window.location.href = 'http://page.jsp?par=" + document.form.name.value + "'" + '"');

But for some reason it doesn't like the par=" + document.form.name.value

Any suggestions?

Derek 朕會功夫 · Accepted Answer · 2011-11-20 05:49:34Z

3

Like this?

<script>
    function doSomething(txt){
        alert(txt);   //alert the text maybe?
        //do more things...
    }
</script>
<input onClick="doSomething(this.value)">

this.value means the value in the textfield.

answered Nov 20, 2011 at 5:49

Derek 朕會功夫

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1 Comment

user1055996 Over a year ago

Thanks, I figured out what I was doing run.

Dave Newton · Accepted Answer · 2011-11-20 05:00:02Z

0

String s = "<input type='button' name='noName' value='Click Me' onclick="
         + "\"window.location.href='http://page.jsp?par="
         + document.form.name.value + "'\"";

Well, that's pretty confusing.

document etc. has zero meaning on the server side. Why aren't you doing this in JavaScript, where it would be a lot easier? Why isn't this in the JSP, where it would be trivial?

If you want to access a form value from a servlet, (a) that form value must have been submitted, and (b) you access it via request.getParameter("parameterName"). But I find it impossible to believe that's the easiest way to do it.

answered Nov 20, 2011 at 5:00

Dave Newton

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