Form submit from modal window to parent window
Use the parent method to pass data back to your meta field. Create a JS function to handle the passing of data from Thickbox to the meta field: function foo_interstitial(data){ $(‘.form-field-selector’).val(data); } Add a submit handler to your thickbox instance that passes to the parent.foo_interstitial() function. $(‘.thickbox-submit-selector’).submit(function(){ var _value_to_pass = $(‘.field-to-pass-selector’).val(); parent.foo_interstitial(_value_to_pass); });