javascript - Cant run code and function call passed as string inside settimeout -

i want run code using settimeout. have function:

 function passing_functions(thefunction)     {     var my_function ="res="+thefunction+ "(); if (res==true){another_function} "  

and on call :

 passing_functions("load_database"); 

i have string:

res = load_database();if (res==true){another_function} 

ok, i'm unable use inside settimetout

settimeout(function() {my_funtion},100} settimeout(function() {my_funtion()},100} settimeout(eval(my_funtion),100} settimeout(my_funtion),100} settimeout(my_funtion()),100} 

etc --- have error or nothing....

also have tried use "this." prefix "thefunction" without success.

could me ? i'm doing wrong ? thanks

note: (i want create array of things executed. use passing_functions(load_database); receive code instead function. because i'm using string pass code.
)

all "function calls" end } instead of ) or have closing ) somewhere in between. the signature settimeout(func, time), i.e. function accepts 2 arguments, function , number. arguments put between (...) , separated commas. assuming my_funtion function, settimeout(my_funtion, 100) valid.

however seems trying run javascript code inside string. don't that. javascript powerful language functions first class citizens. instead of passing name of function , build string, pass function directly:

function passing_functions(thefunction) {     settimeout(         function() { // first argument: function             var res = thefunction(); // call function passed argument             if (res) {                 // assume want *call* function                 // putting another_function there doesn't                 another_function();              }         },         100 // second argument: delay     ); }  // function load_database must exist @ time pass passing_functions(load_database); 

whether or not want cannot say, should give idea how solve issue.