imgdata_off = new Array("images/enquetebottom_off.jpg","images/enquetebottom1_off.jpg");
	imgdata_on = new Array("images/enquetebottom_on.jpg","images/enquetebottom1_on.jpg");

	preimg_off = new Array();
	preimg_on = new Array();

	for(j=0;j<imgdata_off.length;j++){
		preimg_off[j] = new Image();
		preimg_off[j].src = imgdata_off[j];
		preimg_on[j] = new Image();
		preimg_on[j].src = imgdata_on[j];
	}