验证方法
........\限制输入字符串的长度
........\....................\images

........\....................\index.html
........\验证两个文本框的值是否相等
........\..........................\images

........\..........................\index.html
........\验证合法的数据表名称
........\....................\images
........\....................\......\sdd.JPG
........\....................\index.html
........\验证字符串是否以指定字符串开头
........\..............................\images

........\..............................\index.html
........\验证护照编号
........\............\images
........\............\......\sdd.JPG
........\............\index.html
........\验证数据是否为数值型
........\....................\images

........\....................\index.html
........\验证用户名和密码是否正确
........\........................\images

........\........................\index.html
........\验证货币类型
........\............\images

........\............\index.html
........\验证身份证号码
........\..............\images

........\..............\index.html
........\验证车牌号码
........\............\images
........\............\......\sd.JPG
........\............\index.html
........\验证输入的数值是否在指定范围内
........\..............................\images

........\..............................\index.html
........\验证输入的文本是否为汉字
........\........................\images

........\........................\index.html