You are probably getting errors. Add ' debug' after your plugin in plugins.ini. You are better off with explaining what you are trying to do instead of asking for help in 'code talk'.
Code:
public saRs
() {
for(new i; i < sizeof Map_Names; i++
) {
//This makes no sense, you are saying: Map_Check[1] = "give me a random number between 0 and the first character of a random map name"
Map_Check[1] = random_num(0,Map_Names[random_num(0,i)][0])
}
//This will error if your server is not 100% full when it is called. Use get_players() to display it to only connected and alive/dead using flags.
for(new c; c < get_maxplayers(); c++) OylamaMenu(c)
}
It's hard to tell what you're trying to do. Are you trying to make the maps appear in a random order in the menu each time it is displayed to a player?