myImageCnt = 4;
myImage = new Array( 
 "img/top_r2_c2_10.jpg",
 "img/top_r2_c2_12.jpg",
 "img/top_r2_c2_13.jpg",
 "img/top_r2_c2_14.jpg"
 );



myRnd = Math.floor(Math.random()*myImageCnt);
document.write("<img name=top_r2_c2 src='" + myImage[myRnd] + "' width=743 height=310 border=0 alt='•xŽmŽR‚Ì—nŠâ—q‚Ì“X season factory ƒpƒ“‚ÌŽÀ'>");