/* 現在の文字数を表示する
------------------------------------------------------------------------------*/
	function dispLength(arg_id, max_length, target_id){
		arg_id = arg_id.id;

		var now_length = document.getElementById(arg_id).value.length;
		if (now_length > max_length) {
			alert("文字数オーバーです。");
			document.getElementById(arg_id).value = document.getElementById(arg_id).value.substring(0, max_length);
		} else {
			now_length = max_length - now_length;
	
			if (target_id) {
				document.getElementById(target_id).innerHTML = '残り：'+now_length+'文字';
			}
		}
	}