<!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>
<script language="javascript">
function bijiao()
{
var a=form1.shuzi1.value;
var b=form1.shuzi2.value;
if (a-b>0)
alert ("a>b");
else if (a-b<0)
alert ("a<b");
else
alert ("a==b");
}
</script>
</head>
<body>
<form name="form1">
第一个数：<input name="shuzi1" type="text"><br>
第二个数：<input name="shuzi2" type="text"><br>
<input type="button" value="比较" onclick="bijiao()">
</form>
</body>
</html>
怎么让这段代码弹出来的窗口不是X,Y！！！变成写下的数字？？？