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Editorial Team
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Asked: 2026-06-10T21:17:44+00:00

I’m working for a client and I need to generate a coupon number on

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I’m working for a client and I need to generate a coupon number on the fly. I found a javascript that works a charm in generating a random number. The problem is that I need to input the random number that’s generated into another field – capture it somehow. My javascript knowledge is limited. Any suggestion or help is greatly appreciated.

<script type="text/javascript">
function randomnumber() {
document.forms[0].randomnumber.value=(Math.round(Math.random()*9999999999999999+1));
}
onload=randomnumber

</script>
</head>
<body>
<form>
<input id="randomnumber"type="text" name="randomnumber" readonly>
</form>
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1 Answer

  1. Editorial Team

    It sounds like you need to store the random number to use in multiple places:

    function getRandomNumber() {
    return Math.round(Math.random()*9999999999999999+1);
};

var randomNumber = getRandomNumber();

document.getElementById('randomnumber').value = randomNumber;

// do whatever else you want with the randomNumber variable
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