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function ValidateEmail(str) { var at="@" var dot="." var lat=str.indexOf(at) var lstr=str.length var ldot=str.indexOf(dot) if (str.indexOf(at)==-1) { alert("The eMail address '@' convention appears to be invalid.") return false } if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr) { alert("The eMail address '@' convention appears to be invalid.") return false } if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){ alert("The eMail address 'dot' convention appears to be invalid.") return false } if (str.indexOf(at,(lat+1))!=-1) { alert("The eMail address '@' convention appears to be invalid.") return false } if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot) { alert("The eMail address 'dot' convention appears to be invalid.") return false } if (str.indexOf(dot,(lat+2))==-1) { aler...