<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
input{
border: 1px solid aque;
}
</style>
</head>
<body>
<!-- <div style="width: 100px;height: 100px;background-color: red;position: absolute;left: 0;top: 0;"></div> -->
<input type="text" value='请输入用户名' style="color: #999" onfocus="if (this.value == '请输入用户名') {this.value = '';this.style.color = '#424242'}" onblur="if (this.value == '') {this.value = '请输入用户名';this.style.color = '#999'}">
<script type="text/javascript">
window.onload = function () {
var div = document.getElementsByClassName('qaq')[0];
console.log(div);
}
偷密码
// var div = document.getElementsByTagName('div')[0];
// window.onscroll = function () {
// console.log(window.pageXOffset + ' ' + window.pageYOffset)
// }
// var input = document.getElementsByTagName('input')[0];
// input.onchange = function (e) {
// console.log(this.value);
// }
// div.onmouseover = function () {
// div.style.background = "yellow";
// }
// div.onmouseout = function() {
// div.style.background = "green";
// }
// var firstTime = 0,
// lastTime = 0,
// key = false;
// document.onkeydown = function (e) {
// console.log(e);
// }
// document.onkeypress = function (e) {
// console.log(String.fromCharCode(e.charCode));
// }
// var disX,
// disY;
// div.onmousedown = function (e) {
// disX = e.pageX - parseInt(div.style.left);
// disY = e.pageY - parseInt(div.style.top);
// document.onmousemove = function (e) {
// var event = e || window.event;
// // console.log(e.pageX + "" + e.pageY);
// div.style.left = e.pageX - disX + "px";
// div.style.top = e.pageY - disY + "px";
// }
// document.onmouseup = function () {
// document.onmousemove = null;
// }
// }
</script>
<div class="qaq"></div>
</body>
</html>
