abduRahman, вы что недоговариваите ))) тут не пропадает
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
</head>
<body>
<form name="9mmammo">
<input type="text" id="count1" value="1" oninput="calc1(+this.value||0)"><div>Сумма: <span id="result1">5</span> руб.</div>
</form>
<form name="556ammo">
<input type="text" id="count2" value="1" oninput="calc2(+this.value||0)"><div>Сумма: <span id="result2">10</span> руб.</div>
</form>
<script type="text/javascript">
function calc1(amount){
if (amount <=10)
{
document.getElementById('result1').innerHTML = amount * 140;
}
else {
document.getElementById('result1').innerHTML = amount * 130;
}
};
;
function calc2(amount)
{
document.getElementById('result2').innerHTML = amount * 10;
}
</script>
</body>
</html>
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