E-Mail Address Validation:
Email Address:
*Works in Netscape 6
Code:
Place in the <HEAD>:
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<SCRIPT LANGUAGE="Javascript"> <!-- function emailCheck (emailStr) { var errStr="Please enter a valid E-mail address." var emailPat=/^(.+)@(.+)$/ var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]" var validChars="\[^\\s" + specialChars + "\]" var quotedUser="(\"[^\"]*\")" var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/ var atom=validChars + '+' var word="(" + atom + "|" + quotedUser + ")" var userPat=new RegExp("^" + word + "(\\." + word + ")*$") var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$") var matchArray=emailStr.match(emailPat) if (matchArray==null) { alert(errStr) return false } var user=matchArray[1] var domain=matchArray[2] if (user.match(userPat)==null) { alert(errStr) return false } var IPArray=domain.match(ipDomainPat) if (IPArray!=null) { for (var i=1;i<=4;i++) { if (IPArray[i]>255) { alert(errStr) return false } } return true } var domainArray=domain.match(domainPat) if (domainArray==null) { alert(errStr) return false } var atomPat=new RegExp(atom,"g") var domArr=domain.match(atomPat) var len=domArr.length if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>3) { alert(errStr) return false } if (len<2) { alert(errStr) return false } return true; } //--> </script>
Place in the <BODY>:
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<form name=emailform onSubmit="return emailCheck(this.email.value);"> Email Address: <input type=text name="email"> <input type=submit value="Submit"> </form>