基于javascript实现数字英文验证码

本文实例为大家分享了js实现数字英文验证码的具体代码，供大家参考，具体内容如下

<html><head><style type="text/css">.code{background-image:url（111.jpg）;font-family:Arial,宋体;font-style:italic;color:green;border:0;padding:2px 3px;letter-spacing:3px;font-weight:bolder;}.unchanged {border:0;}</style><script language="javascript" type="text/javascript">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<codeLength;i++） {var charIndex = Math.floor（Math.random（）*32）;code +=selectChar[charIndex];}if（code.length ！= codeLength）{createCode（）;}checkCode.value = code;}function validate （） {var inputCode = document.getElementById（"input1"）.value.toUpperCase（）;if（inputCode.length <=0） {alert（"请输入验证码！"）;return false;}else if（inputCode ！= code ）{alert（"验证码输入错误！"）;createCode（）;return false;}else {alert（"成功！"）;return true;}}</script><meta http-equiv="Content-Type" content="text/html; charset=gb2312"></head><body onLoad="createCode（）;"><input type="text" id="input1" /><input type="button" id="checkCode" class="code" style="width:60px" onClick="createCode（）" /> <a href="#" onClick="createCode（）">看不清楚</a><input id="Button1" onClick="validate（）;" type="button" value="确定" /><script></script></body></html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。