var pageGoTopTimer;
function pageGoTop(){
	if(pageGoTopTimer) clearTimeout(pageGoTopTimer);
	var arrXY = getScrollXY();
	var iX = arrXY[0]-50;
	var iY = arrXY[1]-50;
	if(iY > -50){
		window.scrollTo(iX,iY);
		pageGoTopTimer = setTimeout("pageGoTop()",10);
	}else{
		clearTimeout(pageGoTopTimer);
	}
}
function getScrollXY() {
  var scrOfX = 0, scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' ) {
    //Netscape compliant
    scrOfY = window.pageYOffset;
    scrOfX = window.pageXOffset;
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrOfY = document.body.scrollTop;
    scrOfX = document.body.scrollLeft;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
    scrOfY = document.documentElement.scrollTop;
    scrOfX = document.documentElement.scrollLeft;
  }
  return [ scrOfX, scrOfY ];
}