function noESC() {
	try {
		if (event.keyCode == 27) {
			alert("很抱歉, 系統已經取消了 ESC 鍵的功能。");
			return false;
		}
	} catch(err) {
	}
}

if (client == "MSIE") {
	var all_i = document.getElementsByTagName('input');
	for(var i=0;i<=all_i.length;i++) {
		var input = all_i[i];
		try {
			if (input.addEventListener) {
				input.addEventListener("onkeydown",noESC,false);
			} else if (input.attachEvent) {
				input.attachEvent("onkeydown",noESC);
			}
		} catch (err) {
		}
	}
	var all_i = document.getElementsByTagName('textarea');
	for(var i=0;i<=all_i.length;i++) {
		var input = all_i[i];
		try {
			input.attachEvent("onkeydown",noESC);
		} catch (err) {
		}
	}
}