How to pass parameters to setTimeout function [duplicate]

Answer 1

use

var timer = setTimeout(function(){
        countDown(secs)
    },1000);

or

var timer = setTimeout('countDown('  + secs + ')',1000);

In your case the problem was your were using string concatenation with a variable without + sign (my second example) with will cause a syntactical error

Answer 2

Now with recent javascript optimizations in modern browsers, you can simply do:

var timer = setTimeout( countDown( secs ) , 1000 );