Save costum attributes

[AlexVerm12]

Hi,
I'm working on an extension for svg-edit to draw a seatplan. For that, i would like to give some costum attributes to the circle svg. Everything is fine, till I reload the site. After that, all costum attributes a cleared. Maybe someone can help to fix this.

this is how a give the circle element my attributes:

newFO = svgCanvas.addSVGElementsFromJson({ element: 'circle', attr: { cx: opts.start_x, cy: opts.start_y, id: svgCanvas.getNextId(), shape: 'circle', r: 10, radialshift: $id('radialShift').value, fill, stroke, 'stroke-width': strokeWidth, 'row-name': rowName[numberRows], 'seat-name': numberSeats, available: 1, 'full-seat-name': rowName[numberRows] + '|' + numberSeats, zone: '', 'seatplanseat_id': "" } })

[shenggen1987]

you can see sanitize.js in program