var base = {
	onload: window.onload
};
window.onload = function(){
}

function TopNavi_OnMouseOver(area, btn_id){
	var img = $('TopNaviImg');
	if (!img.src_org)
		img.src_org = img.src;
	img.src = img.src.replace(/_[0-9]+/, '_' + btn_id);
	if (area.onmouseout==null){
		area.onmouseout = function(){
			img.src = img.src_org;
		};
	}
}

//ImgBtnクラス
function ImgBtnInternall(imgElm, action, mode){
	if (!imgElm)
		return;
		
	this.imgElm = imgElm;
	this.orgsrc = imgElm.src;
	if(typeof(action) == 'string') {
		if(action.indexOf('over') >= 0){
			this.imgElm.onmouseover = function(){
				this.imgBtnObj.toggle('over');
			};
			this.imgElm.onmouseout = function(){
				this.imgBtnObj.toggle(this.imgBtnObj.LastMode);
			};
		}
		if(action.indexOf('click') >= 0){
			this.imgElm.org_onclick = this.imgElm.onclick;
			this.imgElm.onclick = function(){
				this.imgBtnObj.toggle('on');
				if (this.org_onclick)
					this.org_onclick();
			};
		}
	}
	this.toggle(mode);
}

ImgBtnInternall.prototype = {
	attach : function(imgElm, type, mode, is_suspended){
		if (!imgElm.imgBtnObj)
			imgElm.imgBtnObj = new ImgBtnInternall(imgElm, type, mode);
		imgElm.imgBtnObj.IsSuspended = is_suspended;
		imgElm.imgBtnObj.toggle(mode);
		return imgElm.imgBtnObj;
	}, // End of 'attach' method

	toggle : function(mode){
		if (this.IsSuspended)
			return;

		this.LastMode = this.imgElm.src.replace(/^.*_(off|over|on).*$/, '$1');
		this.imgElm.src = this.imgElm.src.replace(/_(off|over|on)/, '_' + mode);
	} // End of 'toggle' method
} // End of 'ImageButtonIntelnel' class
var ImgBtn = new ImgBtnInternall();

var RollOverImgBtn = {
	attachAtMouseOver : function(btn, mode, is_suspended){
		if(!mode)
			mode = 'off';
		ImgBtn.attach(btn, 'over', mode, is_suspended).toggle('over');
	} // End of 'attachAtMouseOver' method
} //End of 'RollOverImgBtn' class