点击按钮，随机生成数字+大小写字母验证码
所有代码：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>随机生成验证码</title> </head> <style> /*验证码*/ .upload-awrp { overflow: hidden; margin: 120px 0; } .code { font-family: Arial; font-style: italic; font-size: 30px; border: 0; padding: 2px 3px; letter-spacing: 3px; font-weight: bolder; float: left; cursor: pointer; width: 150px; height: 60px; line-height: 60px; text-align: center; vertical-align: middle; border: 1px solid #6D6D72; } </style> <body> <!--随机验证码--> <div> <div></div> </div> <script src="https://www.jb51.net/js/jquery.min.js"></script> <script type="text/javascript"> $.fn.code_Obj = function(o) { var _this = $(this); var options = { code_l: o.codeLength,//验证码长度 codeChars: [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', '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' ], codeColors: ['#f44336', '#009688', '#cddc39', '#03a9f4', '#9c27b0', '#5e4444', '#9ebf9f', '#ffc8c4', '#2b4754', '#b4ced9', '#835f53', '#aa677e'], code_Init: function() { var code = ""; var codeColor = ""; var checkCode = _this.find("#data_code"); for(var i = 0; i < this.code_l; i++) { var charNum = Math.floor(Math.random() * 52); code += this.codeChars[charNum]; } for(var i = 0; i < this.codeColors.length; i++) { var charNum = Math.floor(Math.random() * 12); codeColor = this.codeColors[charNum]; } console.log(code); if(checkCode) { checkCode.css('color', codeColor); checkCode.className = "code"; checkCode.text(code); checkCode.attr('data-value', code); } } }; options.code_Init();//初始化验证码 _this.find("#data_code").bind('click', function() { options.code_Init(); }); }; $('#check-code').code_Obj({ codeLength: 5 }); </script> </body> </html>