/* define image width and height */

var pic_width=200;
var pic_height=200;

/* define image urls */

if (document.images)
 {
     pic1= new Image(pic_width,pic_height);
     pic1.src="images/shutter_def.jpg";  
     pic2= new Image(pic_width,pic_height); 
     pic2.src="images/shutter_pic1.jpg"; 
     pic3= new Image(pic_width,pic_height);
     pic3.src="images/shutter_pic2.jpg";  
     pic4= new Image(pic_width,pic_height);
     pic4.src="images/shutter_pic3.jpg";  
     pic5= new Image(pic_width,pic_height);
     pic5.src="images/shutter_pic4.jpg"; 
     pic6= new Image(pic_width,pic_height);
     pic6.src="images/shutter_pic5.jpg"; 
     pic7= new Image(pic_width,pic_height);
     pic7.src="images/shutter_pic6.jpg"; 
     pic8= new Image(pic_width,pic_height);
     pic8.src="images/shutter_pic7.jpg";
     pic9= new Image(pic_width,pic_height);
     pic9.src="images/shutter_pic8.jpg"; 
}    
 
var pics= new Array(9) 
   pics[0]=pic1.src;
   pics[1]=pic2.src;
   pics[2]=pic3.src;
   pics[3]=pic4.src;
   pics[4]=pic5.src;
   pics[5]=pic6.src;
   pics[6]=pic7.src;
   pics[7]=pic8.src;
   pics[8]=pic9.src;

var numpics=9;

imgName="img";

function change_it()
{
   if (document.images)
    {
      document.write("<IMG SRC='"+pics[0]+"' border='0' width='"+pic_width+"' height='"+pic_height+"' name='img'>\n");
    }
}

function change_it1(thenum)
{
    document[imgName].src=pics[thenum];
}