function dialogShow(obj){
    for(var i=1;i<=3;i++){
		var dialog=document.getElementById("dialog"+i);
		dialog.style.display="none";
	}
    var dialog=document.getElementById(obj);
    dialog.style.display="block";
}
function dialogClose(obj){
    var dialog=document.getElementById(obj);
    dialog.style.display="none";
}