var loginnameReg = new RegExp("[\da-zA-Z]{6,20}");
新建一个new RegExp对象
然后通过对象.test去匹配
if (!loginnameReg.test($(this).val())) {}
或者下面这样
var loginnameReg = /^[x21-x7E]{6,20}$/; var loginpasswordReg = /(?!^\d+$)(?!^[a-zA-Z]+$)(?!^[_#@]+$).{8,}/; var truenameReg = /^[u4E00-u9FA5A-Za-z]+$/; var emailReg =/^(w)+(.w+)*@(w)+((.w{2,3}){1,3})$/;; var phonenumberReg = /^1d{10}$/; if (!loginnameReg.test($(this).val())) {}