var pic = "";

rollpic = function (img_name, img_src) {
document[img_name].src=img_src;
}

hidePict = function(){
document.getElementById("show").style.display = "none";
rollpic('pict', '');
}
showPict = function(imgPath){
document.getElementById("show").style.display = "block";
rollpic('pict', imgPath);
}