/* Copyright (c) 2006 Brandon Aaron (http://brandonaaron.net)
	 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) 
	 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
	 *
	 * $LastChangedDate: 2007-07-21 18:44:59 -0500 (Sat, 21 Jul 2007) $
	 * $Rev: 2446 $
	 *
	 * Version 2.1.1
	 */

(function($){
	$.fn.bgIframe = $.fn.bgiframe = function(s) {
		// This is only for IE6
		if ( $.browser.msie && /6.0/.test(navigator.userAgent) ) {
			s = $.extend({
				top     : 'auto', // auto == .currentStyle.borderTopWidth
				left    : 'auto', // auto == .currentStyle.borderLeftWidth
				width   : 'auto', // auto == offsetWidth
				height  : 'auto', // auto == offsetHeight
				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;
	};

})(jQuery);