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Javascript method to dynamically change layer size_javascript skills

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May 16, 2016 pm 03:59 PM

javascriptdynamic change

The example in this article describes the method of dynamically changing the layer size in JavaScript. Share it with everyone for your reference. The specific implementation method is as follows:

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>动态设置层的大小</title>
<style type="text/css">
.divMain
{
  width:10px;
  height:100px;
  border-style:solid;
  border-width:1px;
  border-color:Green;
  display:none;      
}
</style>
<script type="text/javascript">
var setIntervalID;
function ZoomDiv() {
  var divMain = document.getElementById("divMain");
  divMain.style.width = "200px";
  divMain.style.height = "200px";
}
function ShowDiv() {
  setIntervalID = setInterval("inc()", 100);
}
function inc() {
  var divMain = document.getElementById("divMain2");
  //div不能设置class,否则使用divMain.style.width取到的值时空的
  //只能在元素里设置style="width:10px;height:100px"
  var oldWidth = divMain.style.width;
  var oldHeight = divMain.style.height;
  oldWidth = parseInt(oldWidth);
  oldHeight = parseInt(oldHeight);
  oldWidth += 1;
  oldHeight += 1;
  if (oldWidth >= 200) {
    //清除定时器
    clearInterval(setIntervalID);
    return;
  }
  divMain.style.width = oldWidth + "px";
  divMain.style.height = oldHeight + "px";
}
</script>
</head>
<body>
<input type="button" value="放大层" onclick="ZoomDiv()" />
<input type="button" value="动态放大层" onclick="ShowDiv()" />
<div id="divMain" class="divMain">
案例:跟着鼠标飞的图片。提示:鼠标移动的事件时onmousemove,通过
window.event的clientX,clientY属性获得鼠标的位置
</div>
<!--这里不能设置class,否则使用divMain.style.width取到的值时空的-->
<div id="divMain2" style="width:10px;height:100px;background-color:Red;">
案例:跟着鼠标飞的图片。提示:鼠标移动的事件时onmousemove,通过
window.event的clientX,clientY属性获得鼠标的位置
</div>
</body>
</html>

I hope this article will be helpful to everyone’s JavaScript programming design.

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