function change_img(source,index) {
document.images[index].src = source;
document.images[index].height = 350;
document.images[index].width = 550;
}

function click(){
if(event.button==2){
alert("Copyright (c) www.jonjonassen.net");}
}document.onmousedown=click


function change_img_400(source,index) {
document.images[index].src = source;
document.images[index].height = 400;
document.images[index].width = 550;
}