function doOnScroll(){var C=document.getElementById("scroller");
var D=document.getElementById("scrollerbot");
var B=document.getElementById("scrollertop");
var A=(navigator.userAgent.toLowerCase().indexOf("safari")!=-1)?document.body.scrollTop:document.documentElement.scrollTop;
if(D.offsetTop<(B.offsetTop+A+C.scrollHeight)){if(C.style.position!="absolute"){C.style.top=(D.offsetTop-C.scrollHeight)+"px";
C.style.position="absolute"
}}else{if(navigator.userAgent.toLowerCase().indexOf("ie 6")==-1){if(C.style.position=="absolute"){C.style.position="fixed";
C.style.top="auto"
}}else{C.style.top=(B.offsetTop+A)+"px";
C.style.position="absolute"
}}}window.onscroll=doOnScroll;