//pickup用

function pickupdisp() {
	var divelements = document.getElementsByTagName("div");
	var divarray = new Array();
	for (var i = 0; i < divelements.length; i++) {
		if(divelements[i].id.substring(0,6) == 'pickup'){
			divelements[i].style.display ="none";
			divelements[i].style.visibility ="hidden";
			divarray.push(divelements[i]);
		}
	}
	disp = Math.floor ( Math.random() * divarray.length );
	divarray[disp].style.display ="block";
	divarray[disp].style.visibility ="visible";
}

function pickupdisp2() {
	var cnt = 5;
	var disp = Math.floor ( Math.random() * cnt ) + 1 ;
	var pickup = "pickup" + disp;
	divs = document.getElementById(pickup);
//	alert(disp);
	divs.style.display ="block";
	divs.style.visibility ="visible";
}