var timeID;
var IE = navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1;

wH = 0;
function getInnerSize(){
	if(document.layers){
		wH = window.innerHeight;
	}else{
		wH = document.body.clientHeight;
	}
}

idouSaki = 0;
function getAnchorPos(elementID){//:::::::::::::::::::::::::::::::>-----------------------------------------------------
	getInnerSize();
	var objnew = new Object();
	if( document.getElementById ){
		var obj = document.getElementById(elementID);
		objnew.y = obj.offsetTop;
		while((obj = obj.offsetParent) != null){
			objnew.y += obj.offsetTop;
		}
	}else if( document.all ){
		var obj = document.all(elementID);
		objnew.y = obj.offsetTop;
		while((obj = obj.setParent) != null){
			objnew.y += obj.offsetTop;
		}
	}else if( document.layers ){
		objnew.y = document.anchors[elementID].y;
	}
	else{
		objnew.y = 0;
	}

	if(document.body.scrollHeight){
		pH = document.body.scrollHeight;
		if( (pH - wH) < objnew.y ){
			idouSaki = objnew.y - ( wH - ( pH - objnew.y ));
		}else{
			idouSaki = objnew.y;
		}
	}
	flag = false;
	idou();
}

function getScrollTop(){//:::::::::::::::::::::::::::::::>-----------------------------------------------------
	if(IE){
		return document.body.scrollTop;
	}else if(window.pageYOffset){
		return window.pageYOffset;
	}else{
		return 0;
	}
}

////:::::::::::::::::::::::::::::::>-----------------------------------------------------
idouRitu = 0.28;
speed = 1;
gosa = 1;

oldysc = 0;
flag = false;
function idou(){
	if(!flag){
		ysc = getScrollTop();
		ysc += (( idouSaki - ysc ) *idouRitu ) *speed;
		if(( idouSaki-gosa < ysc && ysc < idouSaki+gosa ) || ( ysc == oldysc )){
			ysc = idouSaki;
			flag = true;
		}
		window.scrollTo(0,ysc);
		oldysc = ysc;
	}

	if(!flag){
		timeID = setTimeout("idou()",100);
	}else{
		clearTimeout(timeID);
	}
}