(function($){
/**
* The bgiframe is chainable and applies the iframe hack to get * around zIndex issues in IE6. It will only apply itself in IE * and adds a class to the iframe called 'bgiframe'. The iframe
* is appeneded as the first child of the matched element(s) * with a tabIndex and zIndex of -1.
* * By default the plugin will take borders, sized with pixel units,
* into account. If a different unit is used for the border's width,
* then you will need to use the top and left settings as explained below.
*
* NOTICE: This plugin has been reported to cause perfromance problems
* when used on elements that change properties (like width, height and
* opacity) a lot in IE6. Most of these problems have been caused by * the expressions used to calculate the elements width, height and * borders. Some have reported it is due to the opacity filter. All * these settings can be changed if needed as explained below.
*
* @example $('div').bgiframe();
* @before <div><p>Paragraph</p></div>
* @result <div><iframe class="bgiframe".../><p>Paragraph</p></div>
*
* @param Map settings Optional settings to configure the iframe.
* @option String|Number top The iframe must be offset to the top
* by the width of the top border. This should be a negative * number representing the border-top-width. If a number is * is used here, pixels will be assumed. Otherwise, be sure
*	to specify a unit. An expression could also be used. * By default the value is "auto" which will use an expression * to get the border-top-width if it is in pixels.
* @option String|Number left The iframe must be offset to the left
* by the width of the left border. This should be a negative * number representing the border-left-width. If a number is * is used here, pixels will be assumed. Otherwise, be sure
*	to specify a unit. An expression could also be used. * By default the value is "auto" which will use an expression * to get the border-left-width if it is in pixels.
* @option String|Number width This is the width of the iframe. If
*	a number is used here, pixels will be assume. Otherwise, be sure
* to specify a unit. An experssion could also be used.
*	By default the value is "auto" which will use an experssion
* to get the offsetWidth.
* @option String|Number height This is the height of the iframe. If
*	a number is used here, pixels will be assume. Otherwise, be sure
* to specify a unit. An experssion could also be used.
*	By default the value is "auto" which will use an experssion
* to get the offsetHeight.
* @option Boolean opacity This is a boolean representing whether or not
* to use opacity. If set to true, the opacity of 0 is applied. If
*	set to false, the opacity filter is not applied. Default: true.
* @option String src This setting is provided so that one could change *	the src of the iframe to whatever they need.
*	Default: "javascript:false;"
*
* @name bgiframe
* @type jQuery
* @cat Plugins/bgiframe
* @author Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
*/
$.fn.bgIframe = $.fn.bgiframe = function(s) {
if ( $.browser.msie && parseInt($.browser.version) <= 6 ) {
s = $.extend({
top : 'auto',
left : 'auto',
width : 'auto',
height : 'auto',
opacity : true,
src : 'javascript:false;'
}, s || {});
var prop = function(n){return n&&n.constructor==Number?n+'px':n;},
html = '<iframe class="bgiframe"frameborder="0"tabindex="-1"src="'+s.src+'"'+
'style="display:block;position:absolute;z-index:-1;'+
(s.opacity !== false?'filter:Alpha(Opacity=\'0\');':'')+
'top:'+(s.top=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderTopWidth)||0)*-1)+\'px\')':prop(s.top))+';'+
'left:'+(s.left=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderLeftWidth)||0)*-1)+\'px\')':prop(s.left))+';'+
'width:'+(s.width=='auto'?'expression(this.parentNode.offsetWidth+\'px\')':prop(s.width))+';'+
'height:'+(s.height=='auto'?'expression(this.parentNode.offsetHeight+\'px\')':prop(s.height))+';'+
'"/>';
return this.each(function() {
if ( $('> iframe.bgiframe', this).length == 0 )
this.insertBefore( document.createElement(html), this.firstChild );
});
}
return this;
};
if (!$.browser.version)
$.browser.version = navigator.userAgent.toLowerCase().match(/.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/)[1];
})(jQuery);