// random main img



var mainImg = new Array();



for(h=1;h<=12;h++){

	mainImg[h]=new Image();

	mainImg[h].src="img/index/"+h+".jpg";

}



function mainImgtAct(num) {

	document.images['mainImg'].src = mainImg[num].src ;

}



var randomNum = 1;

randomNum = randomNum + Math.floor(Math.random()*12);



function randomImg() {

	mainImgtAct(randomNum);

}