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实例1(文字的放大缩小)
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script>
window.onload = function (){
var oBtn1 = document.getElementById(‘btn1‘);
var oBtn2 = document.getElementById(‘btn2‘);
var oP = document.getElementById(‘p1‘);
var num = 14;
oBtn1.onclick = function (){
num -= 2;
oP.style.fontSize = num + ‘px‘;
// JS 不允许出现"-"
// padding-top paddingTop
// margin-left marginLeft
};
oBtn2.onclick = function (){
// num = num + 2;
num += 2;
oP.style.fontSize = num + ‘px‘;
// JS 不允许出现“-“
};
};
</script>
</head>
</html>
实例1(文字的放大缩小)