[Napoleon_be]

/*
*   _______     _      _  __          __
*  | _____/    | |    | | \ \   __   / /
*  | |         | |    | |  | | /  \ | |
*  | |         | |____| |  | |/ __ \| |
*  | |   ___   | ______ |  |   /  \   |
*  | |  |_  |  | |    | |  |  /    \  |
*  | |    | |  | |    | |  | |      | |
*  | |____| |  | |    | |  | |      | |
*  |_______/   |_|    |_|  \_/      \_/
*
*
*
*  Last Edited: 12-30-07
*
*  ============
*   Changelog:
*  ============
*
*  v2.1
*    -Fixed Bug
*
*  v2.0
*    -Added ML
*    -Optimized Code
*
*  v1.0
*    -Initial Release
*
*/

#define VERSION "2.1"

#include <amxmodx>
#include <amxmisc>
#include <cstrike>

new pcvar

public plugin_init()
{
    register_plugin("Only Admin Spectators",VERSION,"GHW_Chronic")
    pcvar = register_cvar("spec_admin","a")

    register_dictionary("GHW_Admin_Spec.txt")
}

public client_putinserver(id)
{
    set_task(2.0,"check_team",id,"",0,"b")
}

public check_team(id)
{
    static adminflags[32]
    get_pcvar_string(pcvar,adminflags,31)

    if(!is_user_connected(id))
    {
        remove_task(id)
    }
    else if(!(get_user_flags(id) & read_flags(adminflags)) && cs_get_user_team(id)==CS_TEAM_SPECTATOR)
    {
        client_print(id,print_center,"[AMXX] %L",id,"MSG_NOSPEC")
        new num, players[32], Float:ct
        get_players(players,num,"g")
        for(new i=0;i<num;i++)
        {
            if(players[i]!=id && cs_get_user_team(players[i])==CS_TEAM_CT) ct += 1.0
        }
        if(float(num) / 2.0 >= ct) cs_set_user_team(id,CS_TEAM_CT)
        else cs_set_user_team(id,CS_TEAM_T)
    }
}

You can also try this, both codes are untested though. The one above is approved so should be working imo.

#include <amxmodx>

#define PLUGIN "Team join info"
#define VERSION "1.0"
#define AUTHOR "AMXX Community"


public plugin_init() 
{
    register_plugin(PLUGIN, VERSION, AUTHOR)
    register_event( "TeamInfo", "join_team", "a")
}


public join_team()
{    
    new id = read_data(1)
    static user_team[32]
    
    read_data(2, user_team, 31)    
    
    if(!is_user_connected(id) || !(get_user_flags(id) & ADMIN_KICK))
        return PLUGIN_HANDLED   
    
    switch(user_team[0])
    {
        case 'C':  
        {
            // player join to ct's        
        }
        
        case 'T': 
        {
            // player join to terrorist
        }
        
        
        case 'S':  
        {
            client_cmd(id, "chooseteam")
            client_print(id, print_chat, "[AMXx] Only admins can join spectator.")
            return PLUGIN_HANDLED
        }
        
        
    }
    return PLUGIN_HANDLED
    
}