js 之 sleep小实现

1.

function   sleep(n) 
    { 
        var   start=new   Date().getTime(); 
        while(true)   if(new   Date().getTime()-start> n)   break; 
    } 

2. 利用setTimeout

function doStuff()
{
  //do some things
  setTimeout(continueExecution, 10000) //wait ten seconds before continuing
}

function continueExecution()
{
   //finish doing things after the pause
}

3.jquery中

If you're using jQuery, someone actually created a "delay" plugin that's nothing more than a wrapper for setTimeout:

// Delay Plugin for jQuery
// - http://www.evanbot.com
// - © 2008 Evan Byrne

jQuery.fn.delay = function(time,func){
    this.each(function(){
        setTimeout(func,time);
    });

    return this;
};
You can then just use it in a row of function calls as expected:

$('#warning')
.addClass('highlight')
.delay(1000)
.removeClass('highlight');