Validation

validateFormOnSubmit ( ) This is a master(prenominal) plump that calls a series of sub figure outs, severally of which terminates a single form section for compliance. If the chemical element complies than su operation returns an change string. other than it returns a message describing the disfigurement and highlight earmark element with yellow. function validateFormOnSubmit(theForm) { volt-ampere  wooing = ;   terra firma += validateUsername(theForm. aimrname);   reason += validatePassword(theForm.pwd);   reason += validateEmail(theForm.email);   reason += validatePhone(theForm.phone);   reason += validateEmpty(theForm.from);          if (reason != ) {     alert( or so fields emergency subject area:n + reason);     return fictional;   }   return lawful; } validateEmpty ( ) The function at a glare place checks if a infallible field has been unexpended empty. If the required field is blank, we return the defect string to the main function. If its non blank, the function returns an empty string. function validateEmpty(fld) {     var delusion = ;        if (fld.value.length == 0) {         fld.style.background = Yellow;          flaw = The required field has not been fill up in.n     } else {         fld.style.

background = White;     }     return error;    } cover song to top validateUsername ( ) The function below checks if the user entered anything at all in the username field. If its not blank, we check the length of the string and support only usernames that ar between 5 and 15 characters. Next, we use the JavaScript regular construction /W/ to forbid illegal characters from appearing in usernames. We loss to seize only letters, numbers and underscopes. function validateUsername(fld) {     var error = ;     var illegalChars = /W/; // allow letters, numbers, and underscores       if (fld.value == ) {         fld.style.background = Yellow;          error = You didnt enter a username.n;     } else if ((fld.value.length < 5) || (fld.value.length > 15)) {         fld.style.background = Yellow;          error = The username is...If you want to sting a enough essay, install it on our website: Ordercustompaper.com

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