var scrollInt
var scrTime,scrSt,scrDist,scrDur,scrInt,scrSl,scrDistX
function easeInOut(t,b,c,d)
{return(c/2*(1-Math.cos(Math.PI*t/d))+b);}
scrollPage=function()
{scrTime+=scrInt
if(scrTime<scrDur){window.scrollTo(easeInOut(scrTime,scrSl,scrDistX,scrDur),easeInOut(scrTime,scrSt,scrDist,scrDur))}else{window.scrollTo(scrSl+scrDistX,scrSt+scrDist)
clearInterval(scrollInt)}}
jQuery.fn.extend({smoothScroll:function(duration,velocity,marginLeft,marginTop)
{if(typeof(duration)=='undefined')duration=500
if(typeof(velocity)=='undefined')velocity=10
if(typeof(marginLeft)=='undefined')marginLeft=0
if(typeof(marginTop)=='undefined')marginTop=0
this.click(function(){var element_id=$(this).attr("href")
var source_positions={top:$(this).get(0).offsetTop,left:$(this).get(0).offsetLeft}
var dest_positions={top:$(element_id).get(0).offsetTop-marginTop,left:$(element_id).get(0).offsetLeft-marginLeft}
if(window.scrollY)
scrSt=window.scrollY
else if(document.documentElement.scrollTop)
scrSt=document.documentElement.scrollTop
else
scrSt=document.body.scrollTop
if(window.scrollX)
scrSl=window.scrollX
else if(document.documentElement.scrollLeft)
scrSl=document.documentElement.scrollLeft
else
scrSl=document.body.scrollLeft
scrDist=dest_positions.top-scrSt
scrDistX=dest_positions.left-scrSl
scrDur=500
scrTime=0
scrInt=5
clearInterval(scrollInt)
scrollInt=setInterval(scrollPage,scrInt)
return false})}})