一些常用弹出窗口/拖放/异步文件上传等实用代码

//弹出层剧中
function popup(popupName) {
var _scrollHeight = $(document).scrollTop(); //获取当前窗口距离页面顶部高度
_windowHeight = $(window).height(); //获取当前窗口高度
_windowWidth = $(window).width(); //获取当前窗口宽度
_popupHeight = popupName.height(); //获取弹出层高度
_popupWeight = popupName.width(); //获取弹出层宽度
// _posiTop = (_windowHeight - _popupHeight) / 2 + _scrollHeight - 50;
_posiTop = _scrollHeight + 120;
_posiLeft = (_windowWidth - _popupWeight) / 2;
popupName.css({ "left": _posiLeft + "px", "top": _posiTop + "px", "display": "block" }); //设置position
}
function dragFunc(dragDiv, dragBody) {
if (dragDiv[0] && dragBody[0]) {
var dragAble = false;
var x1 = 0;
var y1 = 0;
var l = 0;
var t = 0;
var divOffset = dragBody.offset();
dragDiv.mousedown(function (e) {
var ss = this;
// var rootId =
dragDiv.css("cursor", "move");
dragAble = true;
// 当前鼠标距离div边框的距离
// 当前鼠标坐标，减去div相对左边的像素
l = parseInt(dragBody.css("left"));
t = parseInt(dragBody.css("top"));
x1 = e.clientX - l;
y1 = e.clientY - t;
x1 = x1 > 0 ? x1 : 0;
y1 = y1 > 0 ? y1 : 0;
this.setCapture && this.setCapture();
});
dragDiv.mousemove(function (e) {
if (!dragAble)
return;
// 当前div左边的坐标
// 当前鼠标坐标，减去鼠标拖动量
var x2 = 0;
var y2 = 0;
//需要考虑滚动条问题！！！
var top = $(document).scrollTop() ? $(document).scrollTop() - 15 : 0;
var left = $(document).scrollLeft() ? $(document).scrollLeft() - 15 : 0;
x2 = e.clientX - x1 + left;
y2 = e.clientY - y1 + top;
x2 = x2 > 0 ? x2 : 0;
y2 = y2 > 0 ? y2 : 0;
//要移动一定数量才移动
if (Math.abs(l - x2) > 10 || Math.abs(t - y2) > 10) {
dragBody.css("left", x2 + "px");
dragBody.css("top", y2 + "px");
}
});
dragDiv.mouseup(function (event) {
if (!dragAble)
return;
dragAble = false;
// dragDiv.css("position", "relative");
this.releaseCapture && this.releaseCapture();
});
}
}
var MyDialog = function (cfg) {
this.config = {
id: (new Date()).getTime().toString(),
el: null,
bodyId: null,
cover: true,
boxHtm: <div class="dialog" > +
<table> +
<tr class="top"> +
<td class="tl"> +
</td> +
<td class="c"> +
</td> +
<td class="tr"> +
</td> +
</tr> +
<tr> +
<td class="c"> +
<div style="width:10px;"></div> +
</td> +
<td class="main"> +
<div class="title"> +
<h3> +
<span class="title_text">请输入标题</span> <a class="cls" href="javascript:;"></a> +
</h3> +
</div> +
<div class="content"> +
请输入内容 +
</div> +
</td> +
<td class="c"> +
</td> +
</tr> +
<tr class="bottom"> +
<td class="bl"> +
</td> +
<td class="c"> +
<div style="width:10px;"></div> +
</td> +
<td class="br"> +
</td> +
</tr> +
</table> +
</div>
};
var scope = this;
if (cfg) {
$.each(cfg, function (key, value) {
scope.config[key] = value;
});
}
this.box = null;
this.cover = null;
this.tmpBody = null;
}
MyDialog.prototype.show = function () {
var scope = this;
var cover = null;
var box = null;
if (this.config.cover) {
if (this.config.id && $(# + this.config.id + _cover)[0]) {
cover = $(# + this.config.id + _cover);
cover.show();
} else {
cover = $(<div style=" display:block; " id=" + this.config.id + _cover" class="coverDiv" ></div>);
$(body).append(cover);
}
scope.cover = cover;
}
if (!$(# + this.config.id)[0]) {
box = $(this.config.boxHtm);
$(body).append(box);
box.attr(id, this.config.id);
if (this.config.title) {
box.find(.title_text).html(this.config.title);
}
if (this.config.bodyId) {
var body = $(# + this.config.bodyId);
var tmp = $(<div></div>).append(body);
var initBody = tmp.html();
scope.tmpBody = $(initBody);
tmp = null;
if (body[0]) {
var con = box.find(.main .content);
body.show();
con.html();
con.append(body);
}
}
if (this.config.el && this.config.el[0]) {
var con = box.find(.main .content);
con.html(this.config.el);
}
//居中
popup(box);
//关闭dialog
box.find(.title .cls).click(function (e) {
scope.close();
e.preventDefault();
return false;
});
dragFunc($(# + this.config.id + .main .title), $(# + this.config.id));
box.show();
this.box = box;
}
}
MyDialog.prototype.close = function () {
//这里有问题
var box = this.box;
var tmpBody = this.tmpBody;
var cover = this.cover;
if (tmpBody && tmpBody[0]) {
$(body).append(tmpBody);
}
if (box && box[0]) {
box.remove();
}
if (cover && cover[0]) {
cover.hide();
}
};

var dia = new MyDialog({
title : title,
bodyId : id,
id : id + _box
});
dia.show();

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="http://www.cnblogs.com/scripts/jquery-1.7.1.js" type="text/javascript"></script>
<script type="text/javascript">
function dragFunc(dragDiv, dragBody, dropBody) {
if (!dropBody[0]) {
dropBody = $(document);
}
if (dragDiv[0] && dragBody[0]) {
var dragAble = false;
var x1 = 0;
var y1 = 0;
var l = 10;
var t = 10;
var init_position = ;
var init_cursor = ;
var tmp_body = null;
dragDiv.mousedown(function (e) {
var ss = this;
init_position = dragBody.css("position");
init_cursor = dragBody.css("init_cursor");
dragBody.css("position", "absolute");
dragDiv.css("cursor", "move");
tmp_body = $(<div class="tmp_div"></div>);
tmp_body.css(width, dragBody.css(width));
tmp_body.css(height, dragBody.css(height));
tmp_body.insertAfter(dragBody);
$(document).bind("selectstart", function () { return false; });
dragAble = true;
// 当前鼠标距离div边框的距离
// 当前鼠标坐标，减去div相对左边的像素
l = parseInt(dragBody.css("left")) ? parseInt(dragBody.css("left")) : 10;
t = parseInt(dragBody.css("top")) ? parseInt(dragBody.css("top")) : 10;
var offset = dragBody.offset();
l = parseInt(offset.left);
t = parseInt(offset.top);
x1 = e.clientX - l;
y1 = e.clientY - t;
x1 = x1 > 0 ? x1 : 0;
y1 = y1 > 0 ? y1 : 0;
this.setCapture && this.setCapture();
});
dragDiv.mousemove(function (e) {
if (!dragAble)
return;
// 当前div左边的坐标
// 当前鼠标坐标，减去鼠标拖动量
var x2 = 0;
var y2 = 0;
//需要考虑滚动条问题！！！
var top = $(document).scrollTop() ? $(document).scrollTop() - 15 : 0;
var left = $(document).scrollLeft() ? $(document).scrollLeft() - 15 : 0;
x2 = e.clientX - x1 + left;
y2 = e.clientY - y1 + top;
x2 = x2 > 0 ? x2 : 0;
y2 = y2 > 0 ? y2 : 0;
//要移动一定数量才移动
if (Math.abs(l - x2) > 10 || Math.abs(t - y2) > 10) {
dragBody.css("left", x2 + "px");
dragBody.css("top", y2 + "px");
}
//红 #993300
//灰 #DBEAF9
//移动结束后判断拖放
var w = parseInt(dragBody.css(width));
var h = parseInt(dragBody.css(height));
$.each(dropBody, function () {
var el = $(this);
el.css(background-color, Gray);
var offset = el.offset();
var _l = offset.left || 0;
var _t = offset.top || 0;
var _w = parseInt(el.css(width));
var _h = parseInt(el.css(height));
if (x2 > _l && x2 + w < _l + _w && y2 > _t && y2 + h < _t + _h) {
el.css(background-color, #DBEAF9);
el.append(tmp_body);
}
var s = ;
});
});
dragDiv.mouseup(function (event) {
if (!dragAble)
return;
$(document).unbind("selectstart");
//还原position 与 cursor
dragBody.css("position", init_position);
dragBody.css("cursor", init_cursor);
//dragBody.css("left", 0);
//dragBody.css("top", 0);
if (tmp_body) {
dragBody.insertAfter(tmp_body);
var offset = tmp_body.offset();
l = parseInt(offset.left);
t = parseInt(offset.top);
dragBody.css("left", l);
dragBody.css("top", t);
tmp_body.remove();
}
dragAble = false;
// dragDiv.css("position", "relative");
this.releaseCapture && this.releaseCapture();
});
}
}
$(document).ready(function () {
var d1 = $(#d1);
var c = $(.c);
dragFunc(d1, d1, c);
});
</script>
<style type="text/css">
div
{
width: 100px;
height: 100px;
border: 1px solid black;
}
.tmp_div
{
border-style: dashed;
}
#c1
{
background-color: Gray;
width: 300px;
height:300px;
float:left;
margin:20px;
}
#c2
{
background-color: Gray;
width: 300px;
height:300px;
float:left;
margin:20px;
}
</style>
</head>
<body>
<div id="c1" class="c">1
<div id="d1">me
</div>
</div>
<div id="c2" class="c">2
</div>
</body>
</html>

<form id="formImg" name="formImg" enctype="multipart/form-data" method="post" action="">
<input type="hidden" name="MAX_FILE_SIZE" value="800000" id="max_size"/>
<input type="hidden" name="callback" value="parent.add_img_input" id="callback"/>
<a class="upbtn"><input type="file" name="userfile" id="userfile" title="支持JPG、GIF、PNG格式，文件小于1M"
name="pic" value="" onchange="javascript:up_img(17);">上传</a>
</form>
document.charset=utf-8;
var form = $(#formImg);
var frame = $(#frame_img);
if (!frame[0]) {
frame = $(<iframe id="frame_img" name="frame_img" style="display:none;" ></iframe>);
}
form.append(frame);
form.attr(target, frame_img);
form.attr(action, url);
form.submit();

document.charset=gbk;