Validation

validateFormOnSubmit ( ) This is a master(prenominal) expire that calls a series of sub starts, severally of which checks a single form section for compliance. If the element complies than sufunction returns an change string. differently it returns a message describing the flaw and highlight earmark element with yellow. function validateFormOnSubmit(theForm) { volt-ampere  lawsuit = ;   causal agency += validateUsername(theForm.username);   reason += validatePassword(theForm.pwd);   reason += validateEmail(theForm.email);   reason += validatePhone(theForm.phone);   reason += validateEmpty(theForm.from);          if (reason != ) {     alert(Some fields emergency subject area: + reason);     return false;   }   return lawful; } validateEmpty ( ) The function at a lower place checks if a need field has been unexpended empty. If the required field is blank, we return the erroneousness string to the main function. If its non blank, the function r eturns an empty string. function validateEmpty(fld) {     var actus reus = ;        if (fld.value. continuance == 0) {         fld.style.background = Yellow;          actus reus = The required field has non been fill up in.     } else {         fld.style.background = White;     }     return error;    } Back 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 permit unaccompanied usernames that ar between 5 and 15 characters. Next, we use the JavaScript regular construction /\W/ to debar illegal characters from appearing in usernames. We loss to allow 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 = Yo u didnt enter a username.;     } else if ! ((fld.value.length < 5) || (fld.value.length > 15)) {         fld.style.background = Yellow;          error = The username is...If you want to get a enough essay, order it on our website: OrderCustomPaper.com

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