function member_del(username){
	var ret=cmd_request("POST","member","member_del","","username",username);
	if(ret.indexOf("_WEBSYS_CLIENT_MESSAGE_:") != -1) {
		var msg="_WEBSYS_CLIENT_MESSAGE_:";
		var code=ret.substr(msg.length,2);
		var ret=ret.substr(msg.length+code.length);
		if(code == "0:") { 
			if(data) alert(ret);
			return ;
		}
	}
	var idx=ret.indexOf("_WEBSYS_SERVER_MESSAGE_:");
	if( idx != -1) {
		var msg="_WEBSYS_SERVER_MESSAGE_:";
		var code=ret.substr(idx+msg.length,2);
		var data=ret.substr(idx+msg.length+code.length);
		if(code == "0:") { 
			if(data) alert(ret);
			return ;
		}
		if(data==undefined) data="";
		return data;
	} 
	alert("member_del : 程式執行錯誤!!\n"+ret);

	return;
}

function member_exists(username) {
	var ret=cmd_request("POST","member","member_exists","","username",username);
	if(ret.indexOf("_WEBSYS_CLIENT_MESSAGE_:") != -1) {
		var msg="_WEBSYS_CLIENT_MESSAGE_:";
		var code=ret.substr(msg.length,2);
		var ret=ret.substr(msg.length+code.length);
		if(code == "0:") { 
			if(data) alert(ret);
			return ;
		}
	}
	var idx=ret.indexOf("_WEBSYS_SERVER_MESSAGE_:");
	if( idx != -1) {
		var msg="_WEBSYS_SERVER_MESSAGE_:";
		var code=ret.substr(idx+msg.length,2);
		var data=ret.substr(idx+msg.length+code.length);
		if(code == "0:") { 
			if(data) alert(ret);
			return ;
		}
		if(data==undefined) data="";
		return data;
	} 
	alert("member_exists : 程式執行錯誤!!\n"+ret);
	return ;
}