From http://jsfiddle.net/

new_gist_file

(function(){
    
    $("#button1").click(onClickButton1);
    $("#button2").click(onClickButton2);
    
    var time
    
    function onClickButton1(){
        time = Date.now()
        console.log(time)
    }    
    
    function onClickButton2(){
        console.log(time)    
    }
})()