img = new Array(24);
img[0]="img/main_night.jpg";
img[1]="img/main_night.jpg";
img[2]="img/main_night.jpg";
img[3]="img/main_night.jpg";
img[4]="img/main_night.jpg";
img[5]="img/main_night.jpg";
img[6]="img/main_night.jpg";
img[7]="img/main_daytime.jpg";
img[8]="img/main_daytime.jpg";
img[9]="img/main_daytime.jpg";
img[10]="img/main_daytime.jpg";
img[11]="img/main_daytime.jpg";
img[12]="img/main_daytime.jpg";
img[13]="img/main_daytime.jpg";
img[14]="img/main_daytime.jpg";
img[15]="img/main_daytime.jpg";
img[16]="img/main_daytime.jpg";
img[17]="img/main_night.jpg";
img[18]="img/main_night.jpg";
img[19]="img/main_night.jpg";
img[20]="img/main_night.jpg";
img[21]="img/main_night.jpg";
img[22]="img/main_night.jpg";
img[23]="img/main_night.jpg";

function mainimg()
{
date=new Date();
hour=date.getHours();
document.write("<img src="+img[hour]+">");
}