Maybe reason is that one of submitting select box is empty? When it has value - everything is allright. ERROR TEXT FROM JS CONSOLE(Firefox): -------------------------------------------------- Error: uncaught exception: [Exception... "Index or size is negative or greater than the allowed amount" code: "1" nsresult: "0x80530001 (NS_ERROR_DOM_INDEX_SIZE_ERR)" location: "http://localhost/javascripts/prototype.js Line: 381"] -- Sorry for my bad english.. WBR, Ilya Sabanin