Button=new Array();
Button_over=new Array();
Buttoncount=1;

function GetImageName(txt) {
	var back="";
	back=txt.substring(0,txt.lastIndexOf("."));
	return back;
}


function GetImageType(txt) {
	var back="";
	back=txt.substring(txt.lastIndexOf("."),txt.length);
	return back;
}


function ButtonPreload(ob) {
	if(!ob.Bcount) {
		Button_over[Buttoncount]=new Image();
		Button_over[Buttoncount].src=GetImageName(ob.src)+"_O"+GetImageType(ob.src);
		Button[Buttoncount]=new Image();
		Button[Buttoncount].src=ob.src;
		ob.Bcount=Buttoncount;
		Buttoncount++;
	}
}


function ButtonOver(ob) {
	if(Button_over[ob.Bcount]) {
		ob.src=Button_over[ob.Bcount].src;
	}
}


function ButtonOut(ob) {
	if(ob.Bcount) {
		ob.src=Button[ob.Bcount].src;
	}
}