<html>
<head>
<title>数字字母组合订单号</title>
<meta http-equiv='content-type' content='text/html;charset=utf-8'/>
<script type='text/javascript'>
var code ; //在全局定义验证码
function createCode(){
code = "";
var codeLength = 10;//验证码的长度
var checkCode = document.getElementById("code");
var random = new Array(0,1,2,3,4,5,6,7,8,9,'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R',
'S','T','U','V','W','X','Y','Z');//随机数
for(var i = 0; i < codeLength; i++) {//循环操作
var index = Math.floor(Math.random()*36);//取得随机数的索引（0~35）
code += random[index];//根据索引取得随机数加到code上
}
checkCode.value = code;//把code值赋给验证码
}
</script>
<style type='text/css'>
#code{
font-family:Arial,宋体;
font-style:italic;
color:green;
border:0;
padding:2px 3px;
letter-spacing:3px;
font-weight:bolder;
}
</style>
</head>
<body onload='createCode()'> 订单号
<input type = "text" id="code" onClick="createCode()" style="width:100px" />
</p>
</body>
</html>
