Concatination + in javascript with variables
<p>I have an issue with the variables + They both result me 310. But they both have to result me 13 because var1 = 3 and var2 = 10.</p>

<pre><code>var var1 = document.getElementById("start").value;
var var2 = 10;
var3 = var1 + var2; 
alert(var3);
</code></pre>

<p>And Its Html:</p>

<pre><code>&lt;input type="text" id="start" value="3" /&gt;
</code></pre>