var xmlHttp;

function show_dialog(dialogid){
	new Effect.Appear(document.getElementById("shade"), {to:0.5});
	new Effect.Appear(document.getElementById(dialogid));
}

function hide_dialog(dialogid){
	new Effect.Fade(document.getElementById("shade"), {from:0.5});
	new Effect.Fade(document.getElementById(dialogid));
}