Here goes the code, it works better in Chrome but I need it to work on IE as well, for now it doesn't really matters, just I need to make that that I put above to work.
Today I tried that when double-clicking the center handler it changes the step to 13, move the other +13 and -13 relative to the center one and change the step back to 25. However, this does put the other two right next to the one in the center but when I move the one in the center the others don't move right next to it (this is not in the code I'm sending).
Thanks in advance!!