").addClass("ui-widget-overlay")).appendTo(document.body).css({width:this.width(),height:this.height()});return a.fn.bgiframe&&c.bgiframe(),this.instances.push(c),c},destroy:function(b){var c=a.inArray(b,this.instances);c!=-1&&this.oldInstances.push(this.instances.splice(c,1)[0]),this.instances.length===0&&a([document,window]).unbind(".dialog-overlay"),b.remove();var d=0;a.each(this.instances,function(){d=Math.max(d,this.css("z-index"))}),this.maxZ=d},height:function(){var b,c;return a.browser.msie&&a.browser.version<7?(b=Math.max(document.documentElement.scrollHeight,document.body.scrollHeight),c=Math.max(document.documentElement.offsetHeight,document.body.offsetHeight),b