swapping positions
of images
remembered:
 
function pick(chosen){
   if (remember>-1) {
   	hold=document.images[chosen].src;
	document.images[chosen].src=document.images[remember].src;
	document.images[remember].src=hold;
	remember=-1;
   }
   else {remember=chosen;}
   document.f.rem.value=remember;
}
knowing what and 
where the image is

Click on a picture to
reveal its relative
address.

Note: to make this 
work with Netscape
6.2, the preloaded
address and the <img>
source can be compared
by looking at substrings.
5
6
7
8
9

clicked:
source of clicked <img>
 
function findsnake(){
	for(i=5;i<10;i++){
		//note: file with snake is "r/r7.jpg"
		//that file has been preloaded into pix[6]
		if (document.images[i].src==pix[6].src)
		alert("snake is in position: "+i);
	}
}