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    <h2>Single Read</h2> <p>The problem is that you're only reading the value once (at startup), instead of reading it every time the event occurs:</p> <pre><code>// this stores the value at startup (which is why you're always getting 1) var rangeInput = document.getElementById("rangeinput").value; </code></pre> <p>You should be reading the value in the handler instead:</p> <pre><code>function testtest(e) { // read the value from the slider: var value = document.getElementById("rangeinput").value; // now compare: if (value &gt; 0 &amp;&amp; value &lt; 5) { alert("First"); } else { alert("Second"); } } </code></pre> <p>Or to rewrite your code:</p> <pre><code>var rangeInput = document.getElementById("rangeinput"); var buttonInput = document.getElementById("btn"); if (buttonInput.addEventListener) { buttonInput.addEventListener("click", testtest, false); } else if (buttonInput.attachEvent) { buttonInput.attachEvent('onclick', testtest); } function testtest(e) { var value = rangeInput.value; if (value &gt; 0 &amp;&amp; value &lt; 5) { alert("First"); } else { alert("Second"); } } </code></pre> <h2>Updating rangevalue</h2> <p>It also looks like you want to update the output element with the value of the range. What you're currently doing is referring to the element by id:</p> <pre><code>onchange="rangevalue.value=value" </code></pre> <p>However, as far as I know, this isn't standard behavior; you can't refer to elements by their id alone; you have to retrieve the element and then set the value via the DOM.</p> <p>Might I suggest that you add a change listener via javascript:</p> <pre><code>rangeInput.addEventListener("change", function() { document.getElementById("rangevalue").textContent = rangeInput.value; }, false); </code></pre> <p>Of course, you'll have to update the code to use <code>addEventListener</code> or <code>attachEvent</code> depending on the browsers that you want to support; this is where <a href="http://jquery.com/" rel="noreferrer">JQuery</a> really becomes helpful.</p>
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    1. COThanks it works but for a strange reason it only works with Chrome.
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    2. CO@KalPetros - I've updated the answer to address updating the output.
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