img1 = new Image();img1.src = "images/cont_t01r.png";
img2 = new Image();img2.src = "images/cont_t02r.png";
img3 = new Image();img3.src = "images/cont_t03r.png";
img4 = new Image();img4.src = "images/cont_t04r.png";
img5 = new Image();img5.src = "images/cont_t05r.png";
img6 = new Image();img6.src = "images/cont_t06r.png";
img7 = new Image();img7.src = "images/cont_t07r.png";

function chgImg(flname,imgname){
	document.images[imgname].src = flname;
}