var code ; //在全局 定义验证码 function createCode(){ code = new Array(); var codeLength = 4;//验证码的长度 var checkCode = document.getElementById("checkCode"); checkCode.value = ""; var selectChar = new Array(2,3,4,5,6,7,8,9,'A','B','C','D','E','F','G','H','J','K','L','M','N','P','Q','R','S','T','U','V','W','X','Y','Z'); for(var i=0;i
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