Help improve mission system, need help!

[crazyde21]

How can I modify?

I want the players to accept the task, and then create a marker,

When players enter the marker to complete the task.

But my script, I have to take the task, but others can do!

client

--[[------------------------------------------------- 
Notes: 
  
> This code is using a relative image filepath. This will only work as long as the location it is from always exists, and the resource it is part of is running. 
    To ensure it does not break, it is highly encouraged to move images into your local resource and reference them there. 
--]]------------------------------------------------- 
  
  
mission = { 
    gridlist = {}, 
    window = {}, 
    staticimage = {}, 
    button = {}, 
    label = {} 
} 
  
        mission.window[1] = guiCreateWindow(198, 77, 385, 516, "mission", false) 
        guiWindowSetSizable(mission.window[1], false) 
        guiSetAlpha(mission.window[1], 1.00) 
        mission.staticimage[1] = guiCreateStaticImage(9, 22, 366, 484, ":olsystem/images/palette.png", false, mission.window[1])    
        mission.gridlist[1] = guiCreateGridList(0, 0, 177, 485, false, mission.staticimage[1]) 
        guiGridListAddColumn(mission.gridlist[1], "mission list", 0.4) 
        guiGridListAddColumn(mission.gridlist[1], "Status", 0.4) 
        guiGridListAddRow(mission.gridlist[1]) 
        guiGridListSetItemText(mission.gridlist[1], 0, 1, "Police", false, false) 
        guiGridListSetItemText(mission.gridlist[1], 0, 2, "X", false, false) 
        mission.gridlist[2] = guiCreateGridList(178, 0, 188, 484, false, mission.staticimage[1]) 
        guiGridListAddColumn(mission.gridlist[2], " ", 0.9) 
        mission.label[1] = guiCreateLabel(43, 4, 88, 17, "", false, mission.gridlist[2]) 
        guiLabelSetHorizontalAlign(mission.label[1], "center", false) 
        mission.label[2] = guiCreateLabel(2, 30, 186, 322, "", false, mission.gridlist[2]) 
        mission.button[1] = guiCreateButton(107, 437, 81, 47, "Close", false, mission.gridlist[2]) 
        guiSetProperty(mission.button[1], "NormalTextColour", "FFFFFFFF") 
        mission.button[2] = guiCreateButton(12, 437, 81, 47, "accept", false, mission.gridlist[2]) 
        guiSetProperty(mission.button[2], "NormalTextColour", "FFFFFFFF")    
        guiSetVisible(mission.window[1],false)       
  
  
cjped=createPed ( 147, 2514.76758,-1673.75623,13.67720 ,80) 
setElementFrozen ( cjped, true ) 
function addLabelOnClick ( button, state, absoluteX, absoluteY, worldX, worldY, worldZ, clickedElement ) 
if state =="down" then 
    if ( clickedElement )==cjped then 
guiSetVisible(mission.window[1],true) 
end 
end 
end 
  
addEventHandler("onClientGUIClick", getRootElement(), 
            function () 
local row = guiGridListGetItemText ( mission.gridlist[1], guiGridListGetSelectedItem ( mission.gridlist[1] ), 1 ) 
if row == "Police" then 
guiSetText ( mission.label[1], "Police" ) 
guiSetText ( mission.label[2], "Brian:\nFriends,I need your help\nLack of material \nsecurity zone, can you help me\nPolice look to see." ) 
end 
end 
) 
  
addEventHandler ( "onClientClick", getRootElement(), addLabelOnClick ) 
bindKey ("m", "down", 
        function() 
                showCursor( not isCursorShowing() ) 
        end) 
function cancelPedDamage ( attacker ) 
    cancelEvent() 
end 
addEventHandler ( "onClientPedDamage", cjped, cancelPedDamage )      
addEventHandler("onClientGUIClick", mission.button[1],function() 
guiSetText ( mission.label[1], "" ) 
guiSetText ( mission.label[2], "" ) 
guiSetVisible(mission.window[1],false)   
showCursor(false) 
end 
) 
  
addEventHandler("onClientGUIClick", mission.button[2], 
function() 
local player=getLocalPlayer() 
local row = guiGridListGetItemText ( mission.gridlist[1], guiGridListGetSelectedItem ( mission.gridlist[1] ), 1 ) 
if row == "Police" then 
local name=getPlayerName(getLocalPlayer()) 
triggerServerEvent("jjrw",getLocalPlayer(),name,player) 
end 
end 
) 
  
  
  
addEvent("jjrwz",true) 
addEventHandler("jjrwz",getRootElement(), 
function(RW2) 
local name=getPlayerName(getLocalPlayer()) 
if tonumber(RW2)==0  then 
outputChatBox("You do not have to accept the mission!") 
end 
if tonumber(RW2)==1 then 
outputChatBox("mission completed!") 
triggerServerEvent("wcjjrw",getLocalPlayer(),name) 
end 
if tonumber(RW2)==2 then 
outputChatBox("You can not do this task!") 
end  
end 
) 
  

server

handler = mysql_connect( host, username, password, db ) 
  
addEvent("jjrw",true) 
addEventHandler("jjrw",getRootElement(), 
function(name) 
local result = mysql_query(handler, "SELECT RW2 FROM players WHERE Username='"..name.."'") 
for result,row in mysql_rows(result) do  
  mysql_field_seek(result, 1)  
  for k,RW2 in ipairs(row) do 
    local field = mysql_fetch_field(result) 
    if tonumber(RW2)== 2 then 
    outputChatBox("*  Before you have completed this task!",source,255,255,255,true) 
    else 
mysql_query(handler,"UPDATE `players` SET RW2=1 WHERE`Username`= '"..name.."'") 
jjrw = createMarker (1553.51794,-1675.84668,15.19531, "cylinder", 1.5, 255, 255, 0, 170 ) 
outputChatBox("*  You accept the".."police".."take!",source,255,255,255,true) 
 function MarkerHit (thePlayer) 
local name=getPlayerName(thePlayer) 
triggerEvent("checkjjrw",thePlayer,name) 
end 
addEventHandler ( "onMarkerHit", jjrw, MarkerHit ) 
end 
end 
end 
end 
) 
  
  
  
  
    addEvent("checkjjrw",true) 
addEventHandler("checkjjrw",getRootElement(),function(name) 
        local result = mysql_query(handler, "SELECT RW2 FROM players WHERE Username='"..name.."'") 
for result,row in mysql_rows(result) do  
  mysql_field_seek(result, 1)  
  for k,RW2 in ipairs(row) do 
  triggerClientEvent("jjrwz",getRootElement(),RW2) 
  destroyElement ( jjrw ) 
    end 
    end 
    end 
    ) 
    addEvent("wcjjrw",true) 
addEventHandler("wcjjrw",getRootElement(),function(name) 
    mysql_query(handler,"UPDATE `players` SET RW2=2 WHERE`Username`= '"..name.."'") 
    mysql_query(handler,"UPDATE `players` SET Money=Money+500 WHERE`Username`= '"..name.."'") 
    end 
    ) 
     

this is use"Mysql"save mission!