function init(){
		//ar_id=new Array();
		ar_img=new Array();
	}
	function setup(myimg){
		if(myimg){ar_img.push(myimg);}
	}
	function transitPic(fromId,toId,duratio,dela){
		$(fromId).src=ar_img[0];
		$(toId).setStyle('background-repeat: no-repeat;');
		$(toId).setStyle('background-image: url("' + ar_img[1] + '");');
		n=0;
		for (i=1; i<ar_img.length; i++){
			new Effect.Opacity(
				fromId, {
					from : 1.0,
					to : 0.0, 
					duration:duratio, 
					delay:dela,
					queue: 'end',
		  			afterFinish:function(){
						n++;
						$(fromId).src=ar_img[n];
						$(fromId).setOpacity(1.0);
						$(toId).setStyle('background-image: url("' +
												ar_img[n+1] + '")');
						//debug(n);
					}
				}
			);/**/
		}
	}
	function debug(abc){window.alert(abc);}