entering regular expressions in javascript -


im trying add regular expression ^[a-za-z0-9,.&#-]{1-45}@[a-za-z]{1-45}.[a-z]{3}$ validate email addresses javascript code.

if(email=="" || email==null)      {                        document.getelementbyid("em_error").innerhtml="*you must enter email address";         error=true;         return false;     } else     document.getelementbyid("em_error").innerhtml="";

you can use match function.

if(email=="" || email==null || !email.match(/^[a-za-z0-9,.&#-]{1-45}@[a-za-z]{1-45}.[a-z]{3}$/,i))

note

please review pattern, because there should longer , shorter tld 3 characters, .museum, .eu, .nowanytldcantakenformoney


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