|| email == "E-mail address") { alert('Please enter an email address!'); return false; } var emailRegExp = new RegExp("[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?"); if (!emailRegExp.test(email) || email.indexOf('.') == -1) { alert('The email address that you entered is invalid!'); return false; } return true; }

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Chalfie, M., Tu, Y., Euskirchen, G., Ward, W.W. and Prasher D.C. (1994) Green Fluorescent Protein as a Marker for Gene Expression. Science, 263, 802-805.
http://dx.doi.org/10.1126/science.8303295

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