写法类似于上一篇，水平进度条拖拽，具体内容如下
代码如下
注册信息
我是窗口标题，可拖着我走
我是窗口内容
<script>
var popupfather = document.getElementById('popupfather');
var popupson = document.getElementById('popupson');
popupson.onmousedown = function(event){
var event = event || window.event;
var that = this;
var x = event.clientX - popupfather.offsetLeft - 150; //当前鼠标点击处相对于popupfather所在位置x ， -150 是处理margin值
var y = event.clientY - popupfather.offsetTop - 150; //当前鼠标点击处相对于popupfather所在位置y
document.onmousemove = function(event){
var event = event || window.event;
popupfather.style.left = event.clientX - x + "px";
popupfather.style.top = event.clientY- y + "px";
window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
}
}
document.onmouseup = function(){
document.onmousemove = null;
}
</script>