Magento Javascript Validation Classes There are many more validation classes you can assign and I list them here as a reference. For more information on this please use Google, experiment with the code or contact me via my email or the contact form. validate-select Please select an option required-entry This is a required field validate-number Please enter a valid number in this field validate-digits Please use numbers only in this field. please avoid spaces or other characters such as dots or commas validate-alpha Please use letters only (a-z or A-Z) in this field. validate-code Please use only letters (a-z), numbers (0-9) or underscore(_) in this field, first character should be a letter. validate-alphanum Please use only letters (a-z or A-Z) or numbers (0-9) only in this field. No spaces or other characters are allowed validate-street Please use only letters (a-z or A-Z) or numbers (0-9) or spaces and # only in this field validate-phoneStrict