// ==========================
// toppan vr common scripts
// ==========================

// -----------------------------------------------------------------------
// [ show or hide elements ] and [ button change ]

function showorhide(targetid,btnid){
	if(document.getElementById){
		if(document.getElementById(targetid).style.display == "block"){
			document.getElementById(targetid).style.display = "none";
			document.getElementById(btnid).style.visibility = "visible";
		} else {
			document.getElementById(targetid).style.display = "block";
			document.getElementById(btnid).style.visibility = "hidden";
		}
	}
}