<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>阶乘计算器</title>
</head>
<body>
<form>
<input type="text" id='number1' />
<button type="submit" onclick='factorial()'>Submit</button>
<br />
<input type="text" id='number2' />
</form>
<script type="text/javascript">
function factorial(){
var num1=parseInt(document.getElementById('number1').value);
var num2=document.getElementById('number2').value;
if (num1<=1) {
num2=1;
}
else{
num2=num1*arguments.callee(num1-1);
}
}
</script>
</body>
</html>
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qq___524
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>阶乘计算器</title>
</head>
<body>
<form action="">
<input type="text" id='number1' />
<button type="submit" onclick='fun()'>Submit</button>
<br />
<input type="text" id='number2' />
</form>
<script type="text/javascript">
function factorial(num1){
var num2;
if (num1<=1) {
num2=1;
}
else{
num2=num1*arguments.callee(num1-1);
}
return num2;
}
function fun(){
var num1=parseInt(document.getElementById('number1').value);
document.getElementById("number2").value=factorial(num1);
}
</script>
</body>
</html>
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