这个是ie6的bug，并非boxy的问题。在ie6下，select元素的zindex最大，select元素会透过boxy的弹出层显示在其上面。
这里用一个iframe挡住boxy弹出层下的select，使用时只要将useIframe置为true即可，源码如下:
(jquery.boxy.js并不好用，很多jquery的弹出层插件都解决了ie6的这个问题)
/**
* Boxy 0.1.4 - Facebook-style dialog, with frills
*
* (c) 2008 Jason Frame
* Licensed under the MIT License (LICENSE)
*/
/*
* jQuery plugin
*
* Options:
* message: confirmation message for form submit hook (default: "Please confirm:")
*
* Any other options - e.g. 'clone' - will be passed onto the boxy constructor (or
* Boxy.load for AJAX operations)
*/
jQuery.fn.boxy = function(options) {
options = options || {};
return this.each(function() {
var node = this.nodeName.toLowerCase(), self = this;
if (node == 'a') {
jQuery(this).click(function() {
var active = Boxy.linkedTo(this),
href = this.getAttribute('href'),
localOptions = jQuery.extend({actuator: this, title: this.title}, options);
if (active) {
active.show();
} else if (href.indexOf('#') >= 0) {
var content = jQuery(href.substr(href.indexOf('#'))),
newContent = content.clone(true);
content.remove();
localOptions.unloadOnHide = false;
new Boxy(newContent, localOptions);
} else { // fall back to AJAX; could do with a same-origin check
if (!localOptions.cache) localOptions.unloadOnHide = true;
Boxy.load(this.href, localOptions);
}
return false;
});
} else if (node == 'form') {
jQuery(this).bind('submit.boxy', function() {
Boxy.confirm(options.message || 'Please confirm:', function() {
jQuery(self).unbind('submit.boxy').submit();
});
return false;
});
}
});
};
//
// Boxy Class
function Boxy(element, options) {
this.boxy = jQuery(Boxy.WRAPPER);
jQuery.data(this.boxy[0], 'boxy', this);
this.visible = false;
this.options = jQuery.extend({}, Boxy.DEFAULTS, options || {});
//只在ie6下useIframe才起作用
this.options.useIframe = (this.options.useIframe && jQuery.browser.msie && jQuery.browser.version < 7);
if (this.options.useIframe) {
this.options = jQuery.extend(this.options, {modal: true});
}
if (this.options.modal) {
this.options = jQuery.extend(this.options, {center: true, draggable: false});
}
// options.actuator == DOM element that opened this boxy
// association will be automatically deleted when this boxy is remove()d
if (this.options.actuator) {
jQuery.data(this.options.actuator, 'active.boxy', this);
}
this.setContent(element || "<div></div>");
this._setupTitleBar();
this.boxy.css('display', 'none').appendTo(document.body);
this.toTop();
if (this.options.fixed) {
if (jQuery.browser.msie && jQuery.browser.version < 7) {
this.options.fixed = false; // IE6 doesn't support fixed positioning
} else {
this.boxy.addClass('fixed');
}
}
if (this.options.center && Boxy._u(this.options.x, this.options.y)) {
this.center();
} else {
this.moveTo(
Boxy._u(this.options.x) ? this.options.x : Boxy.DEFAULT_X,
Boxy._u(this.options.y) ? this.options.y : Boxy.DEFAULT_Y
);
}
if (this.options.show) this.show();
};
Boxy.EF = function() {};
jQuery.extend(Boxy, {
WRAPPER: "<table cellspacing='0' cellpadding='0' border='0' class='boxy-wrapper'>" +
"<tr><td class='top-left'></td><td class='top'></td><td class='top-right'></td></tr>" +
"<tr><td class='left'></td><td class='boxy-inner'></td><td class='right'></td></tr>" +
"<tr><td class='bottom-left'></td><td class='bottom'></td><td class='bottom-right'></td></tr>" +
"</table>",
DEFAULTS: {
title: null, // titlebar text. titlebar will not be visible if not set.
closeable: true, // display close link in titlebar?
draggable: true, // can this dialog be dragged?
clone: false, // clone content prior to insertion into dialog?
actuator: null, // element which opened this dialog
center: true, // center dialog in viewport?
show: true, // show dialog immediately?
modal: false, // make dialog modal?
fixed: true, // use fixed positioning, if supported? absolute positioning used otherwise
closeText: "<img src='images/img_bgArea02.gif' />", // text to use for default close link
unloadOnHide: false, // should this dialog be removed from the DOM after being hidden?
clickToFront: false, // bring dialog to foreground on any click (not just titlebar)?
behaviours: Boxy.EF, // function used to apply behaviours to all content embedded in dialog.
afterDrop: Boxy.EF, // callback fired after dialog is dropped. executes in context of Boxy instance.
afterShow: Boxy.EF, // callback fired after dialog becomes visible. executes in context of Boxy instance.
afterHide: Boxy.EF, // callback fired after dialog is hidden. executed in context of Boxy instance.
beforeUnload: Boxy.EF, // callback fired after dialog is unloaded. executed in context of Boxy instance.
useIframe: false //支持iframe遮罩层,解决ie6下select z-index最高的bug,只在ie6下时才用的到
},
DEFAULT_X: 50,
DEFAULT_Y: 50,
zIndex: 1337,
dragConfigured: false, // only set up one drag handler for all boxys
resizeConfigured: false,
dragging: null,
// load a URL and display in boxy
// url - url to load
// options keys (any not listed below are passed to boxy constructor)
// type: HTTP method, default: GET
// cache: cache retrieved content? default: false
// filter: jQuery selector used to filter remote content
load: function(url, options) {
options = options || {};
var ajax = {
url: url, type: 'GET', dataType: 'html', cache: false, success: function(html) {
html = jQuery(html);
if (options.filter) html = jQuery(options.filter, html);
new Boxy(html, options);
}
};
jQuery.each(['type', 'cache'], function() {
if (this in options) {
ajax[this] = options[this];
delete options[this];
}
});
jQuery.ajax(ajax);
},
// allows you to get a handle to the containing boxy instance of any element
// e.g. <a href='#' onclick='alert(Boxy.get(this));'>inspect!</a>.
// this returns the actual instance of the boxy 'class', not just a DOM element.
// Boxy.get(this).hide() would be valid, for instance.
get: function(ele) {
var p = jQuery(ele).parents('.boxy-wrapper');
return p.length ? jQuery.data(p[0], 'boxy') : null;
},
// returns the boxy instance which has been linked to a given element via the
// 'actuator' constructor option.
linkedTo: function(ele) {
return jQuery.data(ele, 'active.boxy');
},
// displays an alert box with a given message, calling optional callback
// after dismissal.
alert: function(message, callback, options) {
return Boxy.ask(message, ['确定'], callback, options);
},
// displays an alert box with a given message, calling after callback iff
// user selects OK.
confirm: function(message, after, options) {
return Boxy.ask(message, ['确定', '取消'], function(response) {
if (response == '确定') after();
}, options);
},
// asks a question with multiple responses presented as buttons
// selected item is returned to a callback method.
// answers may be either an array or a hash. if it's an array, the
// the callback will received the selected value. if it's a hash,
// you'll get the corresponding key.
ask: function(question, answers, callback, options) {
options = jQuery.extend({modal: true, closeable: false},
options || {},
{show: true, unloadOnHide: true});
var body = jQuery('<div></div>').append(jQuery('<div class="question"></div>').html(question));
// ick
var map = {}, answerStrings = [];
if (answers instanceof Array) {
for (var i = 0; i < answers.length; i++) {
map[answers[i]] = answers[i];
answerStrings.push(answers[i]);
}
} else {
for (var k in answers) {
map[answers[k]] = k;
answerStrings.push(answers[k]);
}
}
var buttons = jQuery('<form class="answers"></form>');
buttons.html(jQuery.map(answerStrings, function(v) {
return "<input type='button' value='" + v + "' />";
}).join(' '));
jQuery('input[type=button]', buttons).click(function() {
var clicked = this;
Boxy.get(this).hide(function() {
if (callback) callback(map[clicked.value]);
});
});
body.append(buttons);
new Boxy(body, options);
},
// returns true if a modal boxy is visible, false otherwise
isModalVisible: function() {
return jQuery('.boxy-modal-blackout').length > 0;
},
_u: function() {
for (var i = 0; i < arguments.length; i++)
if (typeof arguments[i] != 'undefined') return false;
return true;
},
_handleResize: function(evt) {
var d = jQuery(document);
jQuery('.boxy-modal-blackout').css('display', 'none').css({
width: d.width(), height: d.height()
}).css('display', 'block');
},
_handleDrag: function(evt) {
var d;
if (d = Boxy.dragging) {
d[0].boxy.css({left: evt.pageX - d[1], top: evt.pageY - d[2]});
}
},
_nextZ: function() {
return Boxy.zIndex++;
},
_viewport: function() {
var d = document.documentElement, b = document.body, w = window;
return jQuery.extend(
jQuery.browser.msie ?
{ left: b.scrollLeft || d.scrollLeft, top: b.scrollTop || d.scrollTop } :
{ left: w.pageXOffset, top: w.pageYOffset },
!Boxy._u(w.innerWidth) ?
{ width: w.innerWidth, height: w.innerHeight } :
(!Boxy._u(d) && !Boxy._u(d.clientWidth) && d.clientWidth != 0 ?
{ width: d.clientWidth, height: d.clientHeight } :
{ width: b.clientWidth, height: b.clientHeight }) );
}
});
Boxy.prototype = {
// Returns the size of this boxy instance without displaying it.
// Do not use this method if boxy is already visible, use getSize() instead.
estimateSize: function() {
this.boxy.css({visibility: 'hidden', display: 'block'});
var dims = this.getSize();
this.boxy.css('display', 'none').css('visibility', 'visible');
return dims;
},
// Returns the dimensions of the entire boxy dialog as [width,height]
getSize: function() {
return [this.boxy.width(), this.boxy.height()];
},
// Returns the dimensions of the content region as [width,height]
getContentSize: function() {
var c = this.getContent();
return [c.width(), c.height()];
},
// Returns the position of this dialog as [x,y]
getPosition: function() {
var b = this.boxy[0];
return [b.offsetLeft, b.offsetTop];
},
// Returns the center point of this dialog as [x,y]
getCenter: function() {
var p = this.getPosition();
var s = this.getSize();
return [Math.floor(p[0] + s[0] / 2), Math.floor(p[1] + s[1] / 2)];
},
// Returns a jQuery object wrapping the inner boxy region.
// Not much reason to use this, you're probably more interested in getContent()
getInner: function() {
return jQuery('.boxy-inner', this.boxy);
},
// Returns a jQuery object wrapping the boxy content region.
// This is the user-editable content area (i.e. excludes titlebar)
getContent: function() {
return jQuery('.boxy-content', this.boxy);
},
// Replace dialog content
setContent: function(newContent) {
newContent = jQuery(newContent).css({display: 'block'}).addClass('boxy-content');
if (this.options.clone) newContent = newContent.clone(true);
this.getContent().remove();
this.getInner().append(newContent);
this._setupDefaultBehaviours(newContent);
this.options.behaviours.call(this, newContent);
return this;
},
// Move this dialog to some position, funnily enough
moveTo: function(x, y) {
this.moveToX(x).moveToY(y);
return this;
},
// Move this dialog (x-coord only)
moveToX: function(x) {
if (typeof x == 'number') this.boxy.css({left: x});
else this.centerX();
return this;
},
// Move this dialog (y-coord only)
moveToY: function(y) {
if (typeof y == 'number') this.boxy.css({top: y});
else this.centerY();
return this;
},
// Move this dialog so that it is centered at (x,y)
centerAt: function(x, y) {
var s = this[this.visible ? 'getSize' : 'estimateSize']();
if (typeof x == 'number') this.moveToX(x - s[0] / 2);
if (typeof y == 'number') this.moveToY(y - s[1] / 2);
return this;
},
centerAtX: function(x) {
return this.centerAt(x, null);
},
centerAtY: function(y) {
return this.centerAt(null, y);
},
// Center this dialog in the viewport
// axis is optional, can be 'x', 'y'.
center: function(axis) {
var v = Boxy._viewport();
var o = this.options.fixed ? [0, 0] : [v.left, v.top];
if (!axis || axis == 'x') this.centerAt(o[0] + v.width / 2, null);
if (!axis || axis == 'y') this.centerAt(null, o[1] + v.height / 2);
return this;
},
// Center this dialog in the viewport (x-coord only)
centerX: function() {
return this.center('x');
},
// Center this dialog in the viewport (y-coord only)
centerY: function() {
return this.center('y');
},
// Resize the content region to a specific size
resize: function(width, height, after) {
if (!this.visible) return;
var bounds = this._getBoundsForResize(width, height);
this.boxy.css({left: bounds[0], top: bounds[1]});
this.getContent().css({width: bounds[2], height: bounds[3]});
if (after) after(this);
return this;
},
// Tween the content region to a specific size
tween: function(width, height, after) {
if (!this.visible) return;
var bounds = this._getBoundsForResize(width, height);
var self = this;
this.boxy.stop().animate({left: bounds[0], top: bounds[1]});
this.getContent().stop().animate({width: bounds[2], height: bounds[3]}, function() {
if (after) after(self);
});
return this;
},
// Returns true if this dialog is visible, false otherwise
isVisible: function() {
return this.visible;
},
// Make this boxy instance visible
show: function() {
if (this.visible) return;
if (this.options.modal) {
var self = this;
if (!Boxy.resizeConfigured) {
Boxy.resizeConfigured = true;
jQuery(window).resize(function() { Boxy._handleResize(); });
}
this.modalBlackout = jQuery('<div class="boxy-modal-blackout"></div>')
.css({zIndex: Boxy._nextZ(),
opacity: 0,
width: jQuery(document).width(),
height: jQuery(document).height()})
.appendTo(document.body);
this.toTop();
if (this.options.closeable) {
jQuery(document.body).bind('keypress.boxy', function(evt) {
var key = evt.which || evt.keyCode;
if (key == 27) {
self.hide();
jQuery(document.body).unbind('keypress.boxy');
}
});
}
}
this.boxy.stop().css({opacity: 1}).show();
this.visible = true;
this._fire('afterShow');
this.center();
if (this.options.useIframe == true) {
this.temp_iframe = jQuery("<iframe class='bg_iframe' src='javascript:void(0);' scrolling='no' frameborder='0' style='position: absolute;'></iframe>");
this.temp_iframe.width(this.getSize()[0]);
this.temp_iframe.height(this.getSize()[1]);
this.temp_iframe[0].zIndex = - 1;
var v = Boxy._viewport();
this.temp_iframe.css("top",this.getPosition()[1]);
this.temp_iframe.css("left",this.getPosition()[0]);
jQuery(document.body).append(this.temp_iframe);
this.toTop();
}
return this;
},
//弹层大小会改变时会用到这个方法,Boxy.get(this).auto_resize();
auto_resize:function(){
if (this.options.useIframe == true) {
this.temp_iframe.width(this.getSize()[0]);
this.temp_iframe.height(this.getSize()[1]);
}
},
// Hide this boxy instance
hide: function(after) {
if (!this.visible) return;
var self = this;
if (this.options.modal) {
jQuery(document.body).unbind('keypress.boxy');
this.modalBlackout.animate({opacity: 0}, function() {
jQuery(this).remove();
});
}
this.boxy.stop().animate({opacity: 0}, 300, function() {
self.boxy.css({display: 'none'});
self.visible = false;
self._fire('afterHide');
if (after) after(self);
if (self.options.unloadOnHide) self.unload();
});
if (this.options.useIframe == true) {
jQuery("iframe").remove(".bg_iframe");
}
return this;
},
toggle: function() {
this[this.visible ? 'hide' : 'show']();
return this;
},
hideAndUnload: function(after) {
this.options.unloadOnHide = true;
this.hide(after);
return this;
},
unload: function() {
this._fire('beforeUnload');
this.boxy.remove();
if (this.options.actuator) {
jQuery.data(this.options.actuator, 'active.boxy', false);
}
},
// Move this dialog box above all other boxy instances
toTop: function() {
this.boxy.css({zIndex: Boxy._nextZ()});
return this;
},
// Returns the title of this dialog
getTitle: function() {
return jQuery('> .title-bar h2', this.getInner()).html();
},
// Sets the title of this dialog
setTitle: function(t) {
jQuery('> .title-bar h2', this.getInner()).html(t);
return this;
},
//
// Don't touch these privates
_getBoundsForResize: function(width, height) {
var csize = this.getContentSize();
var delta = [width - csize[0], height - csize[1]];
var p = this.getPosition();
return [Math.max(p[0] - delta[0] / 2, 0),
Math.max(p[1] - delta[1] / 2, 0), width, height];
},
_setupTitleBar: function() {
if (this.options.title) {
var self = this;
var tb = jQuery("<div class='title-bar'></div>").html("<h2>" + this.options.title + "</h2>");
if (this.options.closeable) {
tb.append(jQuery("<a href='#' class='close'></a>").html(this.options.closeText));
}
if (this.options.draggable) {
tb[0].onselectstart = function() { return false; }
tb[0].unselectable = 'on';
tb[0].style.MozUserSelect = 'none';
if (!Boxy.dragConfigured) {
jQuery(document).mousemove(Boxy._handleDrag);
Boxy.dragConfigured = true;
}
tb.mousedown(function(evt) {
self.toTop();
Boxy.dragging = [self, evt.pageX - self.boxy[0].offsetLeft, evt.pageY - self.boxy[0].offsetTop];
jQuery(this).addClass('dragging');
}).mouseup(function() {
jQuery(this).removeClass('dragging');
Boxy.dragging = null;
self._fire('afterDrop');
});
}
this.getInner().prepend(tb);
this._setupDefaultBehaviours(tb);
}
},
_setupDefaultBehaviours: function(root) {
var self = this;
if (this.options.clickToFront) {
root.click(function() { self.toTop(); });
}
jQuery('.close', root).click(function() {
self.hide();
return false;
}).mousedown(function(evt) { evt.stopPropagation(); });
},
_fire: function(event) {
this.options[event].call(this);
}
};