jQuery实现鼠标拖拽登录框移动效果
本文实例为大家分享了jQuery鼠标拖拽登录框移动的具体代码，供大家参考，具体内容如下
1.jQuery代码
<script src="js/jquery-3.5.1.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
$(function () {
// 点击登录跳转
$("a").click(function () {
$("#bg,#login").css("display","block");
})
// 定义变量
var $mX;
var $mY;
var $move = false; // true是可以移动登录框
// 鼠标按下事件
$("#login").mousedown(function (event) {
$(this).css("opacity",0.5); // 改变透明度
$move = true;
// 得到鼠标与登录框原点之间的距离
$mX = event.pageX-parseInt($(this).css("left"));
$mY = event.pageY-parseInt($(this).css("top"));
})
// 鼠标移动事件
$("#login").mousemove(function (event) {
if($move){
// 得到登录框要移动的量
$(this).css("left",(event.pageX-$mX)+"px")
$(this).css("top",(event.pageY-$mY)+"px")
}
}).mouseup(function () {
// 鼠标弹起事件
$move = false;
$(this).css("opacity",1);
})
})
</script>2.css
<style type="text/css">
*{
margin: 0;
padding: 0;
}
h3{
display: block;
width: 300px;
height: 50px;
text-align: center;
line-height: 50px;
background-color: #0076A9;
}
#login{
width: 300px;
height: 200px;
margin: 0 auto;
position: absolute;
top: 250px;
left: 500px;
border: 1px solid #000000;
background-color: #FFFFFF;
cursor: move;
display: none;
}
table{
position: absolute;
top: 50px;
left: 0;
width: 100%;
height: 150px;
text-align:center;
}
tr,td{
border: none;
}
tr{
height: 50px;
}
td{
padding: 0 5px 0 5px;
}
#bg{
width: 100%;
height: 100%;
background-color:#999999;
position: absolute;
top: 0;
left: 0;
display: none;
}
body{
width: 100%;
height: 600px;
}
</style>3.HTML
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>登录界面</title> </head> <body> <a href="javascript:;" >登录</a> <div id="bg"></div> <form action="javascript:;" id="login" method=""> <h3>欢迎登录！</h3> <table border="1" cellspacing="0" cellpadding="0"> <tr> <td align="right">用户名：</td> <td align="left"><input type="text" name="userName"/></td> </tr> <tr> <td align="right">密码：</td> <td align="left"><input type="password" name="pwd"/></td> </tr> <tr> <td align="center" colspan="2"> <input type="button" value="提交"/>       <input type="button" value="重置"/> </td> </tr> </table> </form> </body> </html>
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