function cr_gal_show(i){
	Effect.Appear("black_layer", {duration: 0.2, from:0.0, to:0.8});
	Effect.Appear("big_"+i, {duration: 0.5});
	var ii = 0;
	while(document.getElementById("big_"+ii)){
		if(ii!=i){
			document.getElementById("big_"+ii).style.display = "none";
		}
		ii++;
	}
	
}
function cr_gal_hide(){
	document.getElementById("black_layer").style.display = "none";	
	var ii = 0;
	while(document.getElementById("big_"+ii)){
			document.getElementById("big_"+ii).style.display = "none";
		ii++;
	}
}