无刷新仿google波形扭曲彩色Asp.net验证码





无刷新：也就是一般网站都有的“看不清，点击更换”、“更换验证码”的那种功能

波形扭曲：类似google验证码，这个能更有效的防止验证码被机器人攻破，具体的扭曲程度可以自行设置（正弦曲线Wave扭曲图片产生波形滤镜效果）



彩色：字符颜色都是随机的

大小写：也是随机的，当然为了输入方便没有对大小写进行限制，也可以自己修改哦-Google refresh waveform without distorting color imitation Asp.net Refresh verification code no: that is, both the general site, " are not clear, click on the replacement" , " replace the verification code,"　the kind of waveform distortion function: similar to google code, this can more effective verification code to prevent the robot was broken into and the extent of specific distortions in their own settings (Wave sinusoid waveform distortion generated image filter effects) Color: random characters are case-sensitive color: is random, of course, not in order to facilitate the importation of restrictions on the case, but also can modify Oh