setInterval和setTimeOut的区别

setInterval(方法名,1000)间隔一秒调用一次
setTimeOut(方法名,1000)一秒后调用

//运行
function start(){
     myt1=window.setInterval("a()",1000);
      clock=window.settimeout("timer1()",102)
}
//取消
function stop(){
     window.clearInterval(myt1);
   window.cleartimeout(clock);
}