Edit in JSFiddle

$(function(){
    var startTime;
    var $body = $("body");  
    
    for(i=0;i<1000;i++){
        var $newElement = $("<input type='button' value='Button "+  (i+1)  +"' onclick='window.startTime=new Date()' />​");        
        $newElement.bind("click",function(){
            alert((new Date() - window.startTime) + "秒後執行");
        });
        
        $body.append($newElement);
    }
});