Nigeria-Phone-Number-Validator [without Regex]

This script should serve the purpose of validating Nigerian mobile numbers (070xxxxxxxx, 234xxxxxxxxxx, +234xxxxxxxxxx)from the four major telecommunications companies - MTN, GLO, AIRTEL AND ETISALAT.

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HOW TO USE

1. Add main.js in the js folder to your document
2. Add the id "phone" to the phone field
3. Add the error div to your document
4. Voila! that's all