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 = "#";			// 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;

	}