<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>if...else</title>
<script type="text/JavaScript">
var mymoney,sum=0;//mymoney变量存放不同面值，sum总计
for(mymoney=1;mymoney<=10;mymoney++)
{
sum1= sum + mymoney;
}
document.write("sum合计:"+sum1+"<br /><br />");
</script>
</head>
<body>
</body>
</html>1+2+3+4+5+6+7+8+9=45