var Mac = navigator.appVersion.indexOf('Mac',0) != -1;
var Win = navigator.appVersion.indexOf('Win',0) != -1;
var IE  = navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1;
var NN  = navigator.appName.indexOf("Netscape",0) != -1;
var Moz = navigator.userAgent.indexOf("Gecko") != -1;
var Vmajor = parseInt(navigator.appVersion);	// ex. 3
var Vminor = parseFloat(navigator.appVersion);	// ex. 3.01
var MacIE4 = ((Mac && navigator.appVersion.indexOf('MSIE 4.',0) != -1));
var MacIE3 = ((Mac && navigator.appVersion.indexOf('MSIE 3.',0) != -1));

function getScrollLeft() {
	if ((navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1)) {
		return document.body.scrollLeft;
	} else if (window.pageXOffset) {
		return window.pageXOffset;
	}else{
		return 0;
	}
}

function getScrollTop() {
	if ((navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1)) {
		return document.body.scrollTop;
	} else if (window.pageYOffset) {
		return window.pageYOffset;
	} else {
		return 0;
	}
}

function getScrollWidth() {
	if ((navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1)) {
		return document.body.scrollWidth;
	} else if (window.innerWidth) {
		return window.innerWidth;
	}
	return 0;
}

function getScrollHeight() {
	if ((navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1)) {
		return document.body.scrollHeight;
	} else if (window.innerHeight) {
		return window.innerHeight;
	}
	return 0;
}

var pageScrollTimer;

function pageScroll(toX,toY,frms,cuX,cuY) {
 if (pageScrollTimer) clearTimeout(pageScrollTimer);
 if (!toX || toX < 0) toX = 0;
 if (!toY || toY < 0) toY = 0;
 if (!cuX) cuX = 0 + getScrollLeft();
 if (!cuY) cuY = 0 + getScrollTop();
 if (!frms) frms = 6;

 cuX += (toX - getScrollLeft()) / frms; if (cuX < 0) cuX = 0;
 cuY += (toY - getScrollTop()) / frms;  if (cuY < 0) cuY = 0;
 var posX = Math.floor(cuX);
 var posY = Math.floor(cuY);
 window.scrollTo(posX, posY);
 if (posX != toX || posY != toY) {
  pageScrollTimer = setTimeout("pageScroll("+toX+","+toY+","+frms+","+cuX+","+cuY+")",16);
 }
}

function toTop(){

	if (!MacIE3 && !MacIE4 && !NN && window.scrollTo || NN && (Vminor >= 4.75) && window.scrollTo) {
		pageScroll(0,0,6);
	} else {
		location.hash = "top";
	}
}