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• function validEmail(email) {
• invalidChars = " /:,;"
• if (email == "") { // cannot be empty
• return false
• } // does it contain any invalid characters?
• for (i=0; i<invalidChars.length; i++) {
• badChar = invalidChars.charAt(i)
• if (email.indexOf(badChar,0) != -1) {
• return false
• }
• } // there must be one "@" symbol
• atPos = email.indexOf("@",1)
• if (atPos == -1) {
• return false
• }
• if (email.indexOf("@",atPos+1) != -1) { // and only one "@" symbol
• return false
• }
• periodPos = email.indexOf(".",atPos)
• if (periodPos == -1) { // and at least one "." after the "@"
• return false
• } // must be at least 2 characters after the "."
• if (periodPos+3 > email.length) {
• return false
• }
• return true
• } // check to see if the email's valid

• The Script (Cont’d)

• Email Validation Example

• An if result of -1 means the target was not found