<!DOCTYPE html><html lang="en"><head>
<style>
body {
background: #272822;
color: #ffffff;
}
</style>
<script type="text/JavaScript">
function foo() {
cal=document.getElementById("calc");
cal.value=eval(cal.value);
return false;
}
</script></head><body>
<p>Javascript tester and client-side pastebin.</p>
<input value="5 + 5" id="calc" type="text">
<input value="Click me" type="submit" onclick="return foo();">
</body></html>
