Det kan sagtens lade sig gøre, du kan lave en søgning på email+validation+script eller bruge det her:
(
http://www.javascriptkit.com/script/script2/acheck.shtml)
<form name="validation" onSubmit="return checkbae()">
Please input a valid email address:<br>
<input type="text" size=18 name="emailcheck">
<input type="submit" value="Submit">
</form>
<script language="JavaScript1.2">
//Advanced Email Check credit-
//By JavaScript Kit (
http://www.javascriptkit.com)
//Over 200+ free scripts here!
var testresults
function checkemail(){
var str=document.validation.emailcheck.value
var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
if (filter.test(str))
testresults=true
else{
alert("Please input a valid email address!")
testresults=false
}
return (testresults)
}
</script>
<script>
function checkbae(){
if (document.layers||document.getElementById||document.all)
return checkemail()
else
return true
}
</script>
<p align="center"><font face="arial" size="-2">This free script provided by</font><br>
<font face="arial, helvetica" size="-2"><a href="
http://javascriptkit.com">JavaScript
Kit</a></font></p>