<!DOCTYPE html>
<html lang="ru">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body onload="OnLoad()">
<select></select>
<script>
function OnLoad()
{
for (var i = 0; i < 100; i++)
{
var VarOpt = document.createElement("option");
VarOpt.text = i;
document.querySelector("select").appendChild(VarOpt);
}
}
</script>
</body>
</html>