Question

I am generating input fields dynamically through jsp based on the data taken from server.

some of those fields can be required fields. How can I validate those fields while submitting form to server.

e.g if fields generated are

field1              ----------------

field2 (required)   ----------------

field3              ----------------

Answer 1

With every required field there was a required attribute. So by iterating all fields in javascript and finding required attribute these fields can be validated.

var parmCount = parmTable.rows.length - 1;
for(var i = 0; i < parmCount; i++) {
  //logic to get form values
  if(ParamVal.value == '' && attrVal!= null && attrVal == 'required') {
    //validate here
  }
}