rem: $("select.date-format").change(function() { $(this).parents("div.date-container").children("div.custom-container")[$(this).val() == "custom" ? "show" : "hide"](); 
add: $('select.date-format:not(.date-time-processed)', context).change(function() { $(this).addClass('date-time-processed').parents("div.date-container").children("div.custom-container")[$(this).val() == "custom" ? "show" : "hide"](); 
context:   $("select.date-format").change(function() {    $(this).parents("div.date-container").children("div.custom-container")[$(this).val() == "custom" ? "show" : "hide"]();  });
meta: 6801	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6801/c11cb4ec24479e801076c094f043f2084b344d0c/system.js/clean/modules/system/system.js