Question

I have blocks with ID’s from block1 to block10.

Like this:

<div id="block1"></div>
<div id="block2"></div>
<div id="block3"></div>
<div id="block4"></div>
<div id="block5"></div>
<div id="block6"></div>
<div id="block7"></div>
<div id="block8"></div>
<div id="block9"></div>
<div id="block10"></div>

How do I get random block, with id range from 1 to 10?

Answer 1

var randomnumber=Math.floor(Math.random()*10) + 1;
var obj = document.getElementById('block' + randomnumber);

jQuery:

var randomnumber=Math.floor(Math.random()*10) + 1;
var obj = $('#block' + randomnumber);