function FKJxEffects() {
	// javaScript oop memo
	// http://d.hatena.ne.jp/nazoking/20061119/1163864381
	FKJxEffects_oldSize = new Object();
	
	var object= {};
	object.Size2back = function(obj,frame,interval){ return Size2back(obj,frame,interval); };
	object.Size2zero = function(obj,frame,interval){ return Size2zero(obj,frame,interval); };
	object.setSize = function(obj,size){ return setSize(obj,size); };
	return object;
}

function setSize(obj,size) {
	FKJxEffects_oldSize[obj] =size;
}

function Size2back(obj,frame,interval) {
	var i=1,objw,objh;

	if(FKJxEffects_oldSize[obj]==null) return;
	
	objw = FKJxEffects_oldSize[obj].width;
	objh = FKJxEffects_oldSize[obj].height/frame;

	Size2backAction();

	function Size2backAction() {
		Element.setStyle(obj, {width: objw,height: objh*i});
		Element.makeClipping(obj).show();
		i++;

		if(frame>=i)
			setTimeout(Size2backAction,interval);
	}
}

function Size2zero(obj,frame,interval) {
//tgtが STYLE="position: absolute"の場合効果が違う

	var objw,objh;
	if(FKJxEffects_oldSize[obj]==null) {
		FKJxEffects_oldSize[obj] = Element.getDimensions(obj);
	}

	objw = FKJxEffects_oldSize[obj].width;
	objh = FKJxEffects_oldSize[obj].height/frame;
	Size2zeroAction();

	function Size2zeroAction() {
		if(frame==0)
			objw = 0;
		Element.setStyle(obj, {width: objw, height: objh*frame});
		Element.makeClipping(obj);
		frame--;
		
		if(frame>=0) {
			setTimeout(Size2zeroAction,interval);
		}
	}
}