javascript逐字输出案例

<li id="test"/></li>

<script>

var txtArr = ['热烈欢迎！'],x = 1,y = 0,txt = txtArr[y],timer = null,timer1 = null,cue = $('#test');
function changTxt() {if (x == txt.length+1) {clearTimeout(timer1);timer1 = setInterval(function(){y += 1;if (y > txtArr.length - 1) y = 0;cue.text('');txt = txtArr[y];x=0;},5500);}cue.text(txt.substring(0,x));x+=1;clearTimeout(timer);timer = setTimeout(function(){changTxt();},600);
}
changTxt();

</script>