使用 Javascript 设置正文左边距
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Set body left margin using Javascript
提问by Mack
Setting the body elements left margin using JavaScript does not work, it doesn't move
使用 JavaScript 设置 body 元素左边距不起作用，它不会移动
I don't know why this doesn't work. If I set the left margin using CSS, it works, but not when I do it in JavaScript, why?
我不知道为什么这不起作用。如果我使用 CSS 设置左边距，它可以工作，但当我在 JavaScript 中设置时就不行，为什么？
<html>
<head>
<style type="text/css">
<!--
body { margin-left: 0px; } /* set margin to anything so I can change it in JS*/
-->
</head>
<body>
<div id="test" style="background-color: blue;"> blah </div>
<script type="text/javascript">
<!--
var APP_WIDTH = 555;
var scrWidth = 760; //getScreenSize()["width"];
var xOffset = Math.abs( Math.floor( (scrWidth/2)-(APP_WIDTH/2) ) );
document.getElementsByTagName("body")[0].style.margin.left = xOffset + "px"; // doesn't move the div inside body?
alert( xOffset + "px" );
-->
</script>
</body>
</html>
回答by James Allardice
document.getElementsByTagName("body")[0].style.margin.leftshould be:
document.getElementsByTagName("body")[0].style.margin.left应该：
document.getElementsByTagName("body")[0].style.marginLeft(notice the final property).
document.getElementsByTagName("body")[0].style.marginLeft（注意最终属性）。
回答by Abdullah Jibaly
Use:
利用：
document.body.style.margin = "0px 0px 0px " + xOffset + "px";
