<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<script type="text/javascript">
function calc(){
//输入的数作为数组的最大下标 + 1(数组长度)
var num = parseInt(document.formA.txtNum.value); //输入的位数
//document.write(num + "<br>");
var A = 1,B = 1; //操作数 A B 的初始值
var arrays = new Array(num);
arrays[0] = A;
arrays[1] = B;
for(var i = 2; i < num; i++){
arrays[i] = A + B;
A = arrays[i - 1];
B = arrays[i];
}
//document.write(array[i] + "<br>" + A + "<br>" + B);
document.formA.txtResult.value = B;
}
</script>
<form method="post" action="" name="formA">
<p>
<input type="text" name="txtNum" />
</p>
<p>
<input type="text" name="txtResult" />
</p>
<p>
<input type="button" name="btnSub" value="提交" onclick="calc()" />
</p>
</form>
</body>
</html>