how to increment and decrement the text box value using javascript?
<p>i am trying increment and decrement a number if user is giving in text box is 15 it should be incremented when click a button and also decrement when button clicking...</p>

<p>this is my javascript code</p>

<pre><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;script type="text/javascript"&gt;

    function incNumber() {
        for(i=1;i&gt;0;i++){
        document.getElementById("display").value=i;
    }
    }

    function decNumber() {
        for(i=1;i&gt;0;i--){
        document.getElementById("display").value=i;
    }
    }
    &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
&lt;form&gt;
    &lt;input type="text" value="0"/&gt;
    &lt;input type="button" value="Increase" id="inc" onclick="incNumber()"/&gt;
    &lt;input type="button" value="Decrease" id="dec" onclick="decNumber()"/&gt;

    &lt;label id="display"&gt;&lt;/label&gt;
&lt;/form&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>