为了得到更丰富的自定义对话框功能，于是用JQuery编写了一个对话框插件；只需简单地引用相关JavaScript就能得到丰富的自定义对话框功能。

插件功能特点:

允许通过CSS进行外观控制。

可以任意把面页的元素作为对话框显示。

当对话框激活时，对话框外的任何元素不能接受鼠标操作。

对话框可以在工作区范围内任意移动，根据工作区大小自适应居中功能。

并不需要编写复杂的JavaScript,通过简单HTML属性描述即可。

经过测试插件可以在Firefox和IE下正常工作。

简单使用描述：

引用JQuery和对话框插件文件：

script src=jquery-latest.js/script
script src=messageBox.js/script
定义相关按钮为行：
input id=”Button4″ type=”button” value=”提问对话框“ showoption=”control:test2;width:220;height:120;title:对话框” /
定义相关对话框显示的内容:
div id=”test2″ style=”display:none”
table style=”width: 200px”
tr
td
JQuery模式对话框插件好用吗？/td
/tr
tr
td align=”right”
input id=”Button2″ onclick=”CloseMessageBox()” type=”button” value=”是” /
input id=”Button6″ onclick=”CloseMessageBox()” type=”button” value=”否” //td
/tr
/table
/div
代码如下:
/* JQuery 模式对话框插件

* writer: FanJianHan (henryfan@msn.com)

* License: GPL (GPL-LICENSE.txt) licenses.

*/

//是否已初始化过对话框

var MessageOninit = false;

//记录body滚动条的x,y偏移量;显示内容的元素对象，显示内容元素对象的父对象

var MessageBox_scrolltop,MessageBox_scrollleft,Messagebox_AC,MessageBox_PC;

//对话框对象，对话框宽度，对话框高度

var MessageBox_win,MessageBox_width,MessageBox_height;

//对话框是否处于移动状态

var MessageBox_Moving = false;


//显示模式提示框

function ShowMessageBox(option)

{

var container,iframe,enabled,enabledframe;

var height=400;

var width =400;

MessageBox_scrolltop =0;

MessageBox_scrollleft =0;

if(!MessageOninit)

{

CreateContainer(option);

MessageOninit = true;

$('#messagebox_close').click(function(){

CloseMessageBox();

});

$(window).resize(function(){

SetStyle(option);

SetEnabledStyle();


});

$(window).scroll(function(e){

MessageBox_scrolltop =document.documentElement.scrollTop;

MessageBox_scrollleft = document.documentElement.scrollLeft;

SetEnabledStyle();

});

MessageBox_win = $(”#messagebox_win”);

$('#messagebox_title').mousedown(handleMouseDown);

$('#messagebox_title').mouseup(handleMouseUp);

$('#messagebox_title').mousemove(handleMouseMove);

document.onmouseup = handleMouseUp;



}



if(option.height)

height = parseInt(option.height);

if(option.width)

width = parseInt(option.width);

MessageBox_height = height;

MessageBox_width = width;

Messagebox_AC = $('#'+option.control);

MessageBox_PC = Messagebox_AC.parent();

Messagebox_AC.css('display',”);

enabled='div id=”messagebox_enabled” style=”background-color: lightgrey;width:100%;height:100%;position:absolute;z-index:99998;”/div'

enabledframe='iframe id=”messagebox_enabledframe” frameborder=0 scrolling=no style=”position:absolute; visibility:inherit; top:0px; left_0px; width:100%;height:100%;z-index:99997; “/iframe';

$('#messagebox_enabledframe').remove()_

$('#messagebox_enabled').remove();

$('#messagebox_title').html(option.title);


$('#messagebox_from').append(Messagebox_AC);

SetStyle(option);

$(document.body).append(enabledframe);

$(document.body).append(enabled);

SetEnabledStyle();

$('#messagebox_win').fadeIn(”slow”);



//创建对话框容器

function CreateContainer(option)

{

var html;

html='div id=”messagebox_win” style=”position:absolute;z-index:99999;”table cellpadding=”0″ cellspacing=”0″ id=”messagebox_table”trtd id=”messagebox_title_td”table id=”messagebox_title_table” trtd style=”width:99%;” div id=”messagebox_title” style=”width:100%;cursor: default;”/div/tdtdbutton id=”messagebox_close”/button/td/tr/table/td/trtr id=”messagebox_body_td”td valign=”top” div id=”messagebox_from” style=”text-align: center;”/div/td/tr/table/div';

if(option.parent)

{

$('#' + option.parent).append(html);

}

else

{

$(document.body).append(html);

}

}


//设置显示时背景式样

function SetEnabledStyle()

{

var de,w,h,css,region;

region = GetDocumentRegion();

css ={width:region.width+”px”,height:region.height+”px”,

left: MessageBox_scrollleft+'px',top: MessageBox_scrolltop +'px'}

GetOpacity(css);

$(”#messagebox_enabled”).css(css);

$(”#messagebox_enabledframe”).css(css);

}


//设置透明式样

function GetOpacity(css)

{

if(window.navigator.userAgent.indexOf('MSIE')=1)

{

css.filter= ‘progid:DXImageTransform.Microsoft.Alpha(opacity=30)';

}

else

{

css.opacity= ‘0.3′;

}

}


//设置对话框试样

function SetStyle(option)

{

var region,css;

region = GetDocumentRegion();

css ={width:MessageBox_width+'px',height:MessageBox_height+'px',

left: ((region.width - MessageBox_width)/2)+'px',top: ((region.height - MessageBox_height)/2)+'px'}

if(region.height MessageBox_height )//如果body显示的高度小于对话框高度

{

css.top=10+'px';

}

else

{

css.top=((region.height - MessageBox_height)/2)+'px'

}

$('#messagebox_win').css(css);

css.top='0px';

css.left='0px';

$('#messagebox_table').css(css);

css.width='100%';

css.height='16px';

$('#messagebox_title_td').css(css);

css.height= height-46 +'px';

$('#messagebox_body_td').css(css);



}


var down_x,down_y,cx,cy;

function handleMouseDown(e)

{

var evt = e || event;


down_x=evt.clientX;

down_y = evt.clientY;

cx =(parseInt(MessageBox_win.css('left'))|0);

cy = (parseInt(MessageBox_win.css('top'))|0)

MessageBox_Moving= true;³

document.documentElement.onselectstart = function(){return false};

document.documentElement.ondrag = function(){return false};

document.onmousemove = handleMouseMove;

$(document.body).append('div id=”messagebox_move” style=”position: absolute; z-index:100000;border-right: midnightblue 1px dashed; border-top: midnightblue 1px dashed; border-left: midnightblue 1px dashed; border-bottom: midnightblue 1px dashed;”/div');

$('#messagebox_move').css('width',MessageBox_win.css('width'));

$('#messagebox_move').css('height',MessageBox_win_u99 ？ss('height'));

$('#messagebox_move').css('left',MessageBox_win.css('left'));

$('#messagebox_move').css('top',MessageBox_win.css('top'));



}


function GetDocumentRegion()

{

var w,h,de;

de = document.documentElement;

w = self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;

h = self.innerHeight || (de&&de.clientHeight)|| document.body.clientHeight;

return {height:h,width:w};

}


function handleMouseMove(e)

{

var left,top,region;

if (MessageBox_Moving)

{

var evt = e || event;


left =evt.clientX+cx-down_x;

top = evt.clientY+cy-down_y;

region = GetDocumentRegion();

if(left+ MessageBox_width region.width)

{

left = region.width - 10- MessageBox_width;

}

if(top + MessageBox_height region.height)³

{

top = region.height-10 - MessageBox_height;

}

if(left 10)

left =10;

if(top 10)

top =10;

var css ={left:left+'px',top:top+'px'}

$('#messagebox_move').css(css);

}

}


function handleMouseUp()

{

if(MessageBox_Moving)

{

MessageBox_win.css('width',$('#messagebox_move').css(”width”));

MessageBox_win.css('height',$('#messagebox_move').css(”height”));

MessageBox_win.css('left',$('#messagebox_move').css(”left”));

MessageBox_win.css('top',$('#messagebox_move').css(”top”));

}

MessageBox_Moving _u61 ？ false;

document.onmousemove = null;

$('#messagebox_move').remove();

}



}


//关闭模式对话框

function CloseMessageBox()

{

if(MessageOninit)

{

$('#messagebox_win').hide();

$('#messagebox_enabled').remove();

$('#messagebox_enabledframe').remove();

Messagebox_AC.css('display','none');

MessageBox_PC.append(Messagebox_AC);


}

document.documentElement.onselectstart = null;

document.documentElement.ondrag = null;

}

$(document).ready(function(){

$(document).find('[@showoption]‘).each(function(){

var namevalue;

//虽然显示的元素id,显示宽度,显示高度,标题,对话框寄居的元素对象id

var option={control:”,width:'400′,height:'400′,title:”,parent:null};

var properties = $(this).attr('showoption').split(';');

for(i=0;iproperties.length;i++)

{

namevalue = properties[i].split(':');

if(namevalue.length 1)

{

execute =”option.” + namevalue[0] +'=”+ namevalue[1]+'';';

eval(execute);

}

}


$(this).click(function(){

ShowMessageBox(option);

document.body.focus();

});

});

});