js实现文字超过显示宽度每间隔1s自动向左滚动显示

*{ margin:0; padding:0;}

body{font:12px/1 '微软雅黑';}

.wrapper{font-size: 0.85rem; color: #333; padding-top: 0.75rem; margin: 0 0.75rem; white-space: nowrap; overflow: hidden;width: 300px;}

.inner{ width:1000px;overflow:hidden;}

.inner p{ display:inline-block;}

var wrapper = document.getElementById('wrapper');

var inner = wrapper.getElementsByTagName('div')[0];

var p = document.getElementsByTagName('p')[0];

var p_w = p.offsetWidth;

var wrapper_w = wrapper.offsetWidth;

window.οnlοad=function fun(){

if(wrapper_w > p_w){ return false;}

inner.innerHTML+=inner.innerHTML;

setTimeout("fun1()",2000);

}

function fun1(){

if(p_w > wrapper.scrollLeft){

wrapper.scrollLeft++;

setTimeout("fun1()",30);

}

else{

setTimeout("fun2()",2000);

}

}

function fun2(){

wrapper.scrollLeft=0;

fun1();

}