(function($){$.fn.portamento=function(options){var thisWindow=$(window);var thisDocument=$(document);$.fn.viewportOffset=function(){var win=$(window);var offset=$(this).offset();return{left:offset.left-win.scrollLeft(),top:offset.top-win.scrollTop()}};function positionFixedSupported(){var container=document.body;if(document.createElement&&container&&container.appendChild&&container.removeChild){var el=document.createElement("div");if(!el.getBoundingClientRect){return null}el.innerHTML="x";el.style.cssText="position:fixed;top:100px;";container.appendChild(el);var originalHeight=container.style.height,originalScrollTop=container.scrollTop;container.style.height="3000px";container.scrollTop=500;var elementTop=el.getBoundingClientRect().top;container.style.height=originalHeight;var isSupported=elementTop===100;container.removeChild(el);container.scrollTop=originalScrollTop;return isSupported}return null}function getScrollerWidth(){var scr=null;var inn=null;var wNoScroll=0;var wScroll=0;scr=document.createElement("div");scr.style.position="absolute";scr.style.top="-1000px";scr.style.left="-1000px";scr.style.width="100px";scr.style.height="50px";scr.style.overflow="hidden";inn=document.createElement("div");inn.style.width="100%";inn.style.height="200px";scr.appendChild(inn);document.body.appendChild(scr);wNoScroll=inn.offsetWidth;scr.style.overflow="auto";wScroll=inn.offsetWidth;document.body.removeChild(document.body.lastChild);return(wNoScroll-wScroll)}var opts=$.extend({},$.fn.portamento.defaults,options);var panel=this;var wrapper=opts.wrapper;var gap=opts.gap;var disableWorkaround=opts.disableWorkaround;var fullyCapableBrowser=positionFixedSupported();if(panel.length!=1){return this}if(!fullyCapableBrowser&&disableWorkaround){return this}panel.wrap('<div id="portamento_container" />');var float_container=$("#portamento_container");float_container.css({"min-height":panel.outerHeight(),width:panel.outerWidth()});var panelOffset=panel.offset().top;var panelMargin=parseFloat(panel.css("marginTop").replace(/auto/,0));var realPanelOffset=panelOffset-panelMargin;var topScrollBoundary=realPanelOffset-gap;var wrapperPaddingFix=parseFloat(wrapper.css("paddingTop").replace(/auto/,0));var containerMarginFix=parseFloat(float_container.css("marginTop").replace(/auto/,0));var ieFix=0;var isMSIE=
/*@cc_on!@*/
0;if(isMSIE){ieFix=getScrollerWidth()+4}thisWindow.bind("scroll.portamento",function(){if(thisWindow.height()>panel.outerHeight()&&thisWindow.width()>=(thisDocument.width()-ieFix)){var y=thisDocument.scrollTop();if(y>=(topScrollBoundary)){if((panel.innerHeight()-wrapper.viewportOffset().top)-wrapperPaddingFix+gap>=wrapper.height()){if(panel.hasClass("fixed")||thisWindow.height()>=panel.outerHeight()){panel.removeClass("fixed");panel.css("top",(wrapper.height()-panel.innerHeight())+"px")}}else{panel.addClass("fixed");if(fullyCapableBrowser){panel.css("top",gap+"px")}else{panel.clearQueue();panel.css("position","absolute").animate({top:(0-float_container.viewportOffset().top+gap)})}}}else{panel.removeClass("fixed");panel.css("top","0")}}else{panel.removeClass("fixed")}});thisWindow.bind("resize.portamento",function(){if(thisWindow.height()<=panel.outerHeight()||thisWindow.width()<thisDocument.width()){if(panel.hasClass("fixed")){panel.removeClass("fixed");panel.css("top","0")}}else{thisWindow.trigger("scroll.portamento")}});thisWindow.bind("orientationchange.portamento",function(){thisWindow.trigger("resize.portamento")});thisWindow.trigger("scroll.portamento");return this};$.fn.portamento.defaults={wrapper:$("body"),gap:10,disableWorkaround:false}})(jQuery);