renders HTML area element with "poly" shape
| id | id | id which will be assigned to related HTML section |
| aplha0 | number | starting angle |
| aplha1 | number | ending angle |
| x | number | x position of center |
| y | number | y position of center |
| R | number | radius |
| ky | number | y-scaling factor |
| userdata | string | extra data string (used by chart series) |
map.addSector("12", 0, Math.PI/2, 100,100, 50, 1);