element.selectionStart : NS_ERROR_FAILURE

[anishmgoyal]

When updating a hidden field (which occurs in an event involving multiple different javascript plugins) the request for the property "selectionStart" from variable "element" on line 469 of file "rsf.js" triggers an error.

Hidden fields do not support selection, and so there should be a check for whether or not the field is hidden before affecting selection in any way.

This function is important for updating another field, which is not affected by the script as the exception skips the call to "firer.fire()".