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- <script language="javascript">
- function checkEmail() {
- var email = document.getElementById('email');
- var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
- if (!filter.test(email.value)) {
- alert('Please provide a valid email address');
- email.focus;
- return false;
- }
- }</script>
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