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copied!<p>Your question is something I've been trying to figure out for a while too. This is what I have so far.</p> <p>I use this for validating a single date range. It takes input fields as params rather than dates:</p> <pre><code>jQuery.validator.addMethod("rangeDate", function(value, element, params) { try { var beforedate=$.datepicker.parseDate($(params[0]).datepicker('option','dateFormat'),$(params[0]).val()); var afterdate=$.datepicker.parseDate($(params[1]).datepicker('option','dateFormat'),$(params[1]).val()); var qdate=$.datepicker.parseDate($(element).datepicker('option','dateFormat'),value); return this.optional(element) || (qdate >= beforedate && qdate<=afterdate); } catch(err){ return false; } }, function(params){ return "Date must occur between " + $(params[0]).val() + ' and ' + $(params[1]).val(); } ); </code></pre> <p>and the rule looks like this:</p> <pre><code>rules:{ between_date: { dateCan: true, rangeDate: { depends: function(element) { //check that params exist return $("input[name='before_date']").valid() && $("input[name='after_date']").valid(); }, param: ["input[name='before_date']", "input[name='after_date']"] } } } </code></pre> <p>After experimenting a bit, I've seen that it's possible to have more than one <code>rangeDate</code> rule for a field. However, the last call appears to overwrite the results of all the previous <code>rangeDate</code> calls for that field. So I <em>think</em> what might work is to add another custom rule that accepts an array of pairs of fields which can be fed to <code>rangeDate</code>. The problem with this approach is that the the <code>depends</code> clause for the <code>rangeDate</code> rule becomes unwieldy as you get more date pairs. This is especially so if you only require at least one pair to be present rather than all pairs.</p> <p>Of course, if the date ranges aren't dynamic, the problem is easier because no <code>depends</code> clause is necessary. Just rewrite <code>rangeDate</code> to accept dates rather than fields and write a wrapper rule to accept an array of pairs of dates.</p> <p>If you've found a solution to the problem, I'd love to see it. Hopefully it will be more elegant than mine.</p>

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