javascript - Validating email using js -

i trying create form allows people submit email using @msu.edu email. have alert coming when it's not msu.edu email, when use email test@msu.edu not submitting form.

function checkmail() {     var email = document.validation.email.value.tolowercase();     var filter = /^([\w-]+(?:\.[\w-]+)*)@msu.edu/i;     var result = filter.test(email);     alert('valid email found: ' + result);     return result; } 

you need escape . there.

correct code:

function checkmail() {     var email = document.validation.email.value.tolowercase();     var filter = /^([\w-]+(?:\.[\w-]+)*)@msu\.edu/i;     //                                       ^-- escape dot     var result = filter.test(email);     alert('valid email found: ' + result);     return result; } 

demo