var scrollInt;
var scrTime, scrSt, scrDist, scrDur, scrInt;




function replaceAnchorLinks()
{
var anchors, i, targ, targarr;

if (!document.getElementById)
return;

// get all anchors
anchors = document.getElementsByTagName("a");

for (i=0;i<anchors.length;i++)
{

// check if href links to an anchor on this page
if ( anchors[i].href.indexOf("#") != -1 && anchors[i].href.indexOf( document.URL ) != -1 )
{
// get name of target anchor
targ = anchors[i].href.substring( anchors[i].href.indexOf("#")+1 );

// find target anchor
targarr = document.getElementsByName( targ );

if (targarr.length)
{
anchors[i].className = (targarr[0].offsetTop < anchors[i].offsetTop) ? "up" : "down";
anchors[i].id = "__" + targ;	// save target as id with prefix (used in onclick function below)
anchors[i].onmousedown = function () { scrollToAnchor( this.id.substring( 2 ) ); return false; };
anchors[i].href = "javascript:;";			// rewrite href
}
}

}
}


/*	SCROLL FUNCTIONS  */

function scrollPage()
{
scrTime += scrInt;
if (scrTime < scrDur) {
window.scrollTo( 0, easeInOut(scrTime,scrSt,scrDist,scrDur) );
}else{
window.scrollTo( 0, scrSt+scrDist );
clearInterval(scrollInt);
}
}

function scrollToAnchor(aname)
{
var anchors, i, ele;

if (!document.getElementById)
return;

// get anchor
anchors = document.getElementsByTagName("a");
for (i=0;i<anchors.length;i++) {
if (anchors[i].name == aname) {
ele = anchors[i];
i = anchors.length;
}
}

// set scroll target
if (window.scrollY)
scrSt = window.scrollY;
else if (document.documentElement.scrollTop)
scrSt = document.documentElement.scrollTop;
else
scrSt = document.body.scrollTop;



scrDist = ele.offsetTop - scrSt;
scrDur = 500;
scrTime = 0;
scrInt = 10;

// set interval
clearInterval(scrollInt);
scrollInt = setInterval( scrollPage, scrInt );
}

/* EASING FUNCTIONS	*/

function easeInOut(t,b,c,d)
{
return c/2 * (1 - Math.cos(Math.PI*t/d)) + b;
}

if (window.attachEvent){
window.attachEvent("onload", replaceAnchorLinks);
}else{
window.onload = replaceAnchorLinks;
}