function centerobj(objecty) {
var namelem = $(objecty); //'btop'
var windowHW = getwindowSize();
var scrollxy = getScrollXY();
namelem.setStyle({
left:(( 0 - namelem.offsetWidth + windowHW[0] + scrollxy[0] ) + 'px'),
top:(( 0 - namelem.offsetHeight + windowHW[1] + scrollxy[1] ) + 'px')
});
}

function getY(objecty) {
	var iReturnValue = 0;
	while( objecty != null ) {
		iReturnValue += $(objecty).offsetTop;
		objecty = $(objecty).offsetParent;
	}
	return iReturnValue;
}
function getX(objecty) {
	var iReturnValue = 0;
	while( objecty != null ) {
		iReturnValue += $(objecty).offsetLeft;
		objecty = $(objecty).offsetParent;
	}
	return iReturnValue;
}

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 ];
}
function getwindowSize() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
	return [ myWidth, myHeight ];
}

function isArray(obj) {
return obj.isArray;
}
Array.prototype.isArray = function(){return true;}

String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,"");
}