HTML JavaScrip random number select

I have been trying to get a random number generator for the numbers to be between the two inputs. I have a code

<form action="/action_page.php">
<input type="number" name="low" id="low" placeholder="lowest number" value="1"><br>
<input type="number" name="high" id="high" placeholder="highest number" value="10"><br>
<input type="button" value="Submit" onclick="myFunction()">
</form>
<p id="randnum"></p>

<script>
function myFunction() {
    var x = document.getElementById("randnum")
    x.innerHTML = Math.floor((Math.random() * 'low') + 'high');
}
</script>

As you would have noticed, I have the javascript in the one code.

where I put in 'low' and 'high' works with a fixed number