Question

js中怎么设置span的位置

<div class="container-fluid">
<div class="container" id="con-rolling">
<span class="lead" id="rolling">!!!!!!!!!!！</span>
</div>
</div>

我要在js中设置span的位置，比如距离父容器左侧500px的位置，要怎么写，给个思路。谢谢
js文件↓

function Rolling() {
var conWidth = $("#con-rolling").width();
var conWidthNum = parseInt(conWidth);
var conParent = $("#con-rolling").offset().left;
var conParentNum = parseInt(conParent);
var num = 15;
var sum = conWidthNum + conParentNum + 15;
alert(sum);alert(typeof sum);
var rolling = document.getElementById("rolling");
rolling.style.width = sum + "px";
}

Answer 1

var span=document.getElementById("rolling");
span.style.marginLeft="500px";