Using JQuery Validate Plugin to validate multiple form fields with identical names

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Instead of changing the source file jquery.validation you can simply override the function you need to edit only in the pages that requires it.

An example would be:

$.validator.prototype.checkForm = function() {
    //overriden in a specific page
    this.prepareForm();
    for (var i = 0, elements = (this.currentElements = this.elements()); elements[i]; i++) {
        if (this.findByName(elements[i].name).length !== undefined && this.findByName(elements[i].name).length > 1) {
            for (var cnt = 0; cnt < this.findByName(elements[i].name).length; cnt++) {
                this.check(this.findByName(elements[i].name)[cnt]);
            }
        } else {
            this.check(elements[i]);
        }
    }
    return this.valid();
};

This might not be the best solution, but at least it avoids editing source files, that could be replaced later, when a new version releases. Where your overridden function might or might not break.

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