I have a form, and i am using jquery to validate the inputs.

i have some fields which i am calculating and if it is equal to the input it changes the class of the input field to "good"

so fx:

participants: 10

option1: 3

option2: 2

option3: 5

if(option1+option2+option3 = "number of participants"){

change the class to good

}

else {

change the class to error

}

so it is chaning acording to the entries.

the important thing is that the field should be class="good" before it can be submitted 

any good ideas?