日期:2014-05-17  浏览次数:21064 次

求jsp高手进入
<html>
<head>
<title>求数值的阶乘</title>
<script language="javascript" type="text/javascript">
<!--
function factorial(anumber)
{
anumber=math.floor(anumber);
if (anumber<0)
{
return -1;
}
if (anumber==0)
{
return 1;
}
else return(anumber*factorial(anumber-1));
}
//-->
</script>
</head>
<body>
<h2>请在文本框中输入一个整数,然后单击“计算”按钮,计算该整数的阶乘。</h2>
<form name="myform">
<input name="factorial" value=""><p>
<input type="butten" value="计算" onclick="factorial(anumber)"><p>
</form>
</body>
</html>



新手求教  

阶乘函数的调用该怎吗编写 在网上查的编码调用不出来 是怎莫回事啊 不知道错哪了

------解决方案--------------------
HTML code

<html>
<head>
<title>求数值的阶乘</title>
<script language="javascript" type="text/javascript">

function factorial(anumber)
{
anumber = Math.floor(anumber);
if (anumber<0)
{
return -1;
}
if (anumber==0)
{
return 1;
}
else return(anumber*factorial(anumber-1));
}

</script>
</head>
<body>
<h2>请在文本框中输入一个整数,然后单击“计算”按钮,计算该整数的阶乘。</h2>
<form name="myform">
<input id="num" type="text" name="num" value=""><p>
<input type="button" value="计算" onclick="result.value=factorial(num.value)"><p>
<input id="result" type="text"  name="result" value=""><p>
</form>

</body>
</html>

------解决方案--------------------
给你调试了一下,现在可以了:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
<script language="javascript" type="text/javascript">
function result(){
var num=document.getElementById("factorial").value;
document.getElementById("txtOutput").value=factorial(num);
}

function factorial(anumber)
{
anumber=Math.floor(anumber);
if (anumber<0)
{
return -1;
}
if (anumber==0)
{
return 1;
}
else{
anumber=anumber*factorial(anumber-1);
}
 return anumber;
}
</script>
</head>
<body>
<h2>请在文本框中输入一个整数,然后单击“计算”按钮,计算该整数的阶乘。</h2>
<form name="myform">
输入数字:<input name="factorial" value=""><p>
输出结果:<input name="txtOutput" value=""><p>
<input type="button" value="计算" onclick='result()' /><p>
</form>
</body>