BEGIN
 FOR I IN 1 .. APEX_APPLICATION.G_F01.COUNT
 LOOP
 cher_sp.load_ndfl6.download_file(TO_NUMBER(APEX_APPLICATION.G_F01(i)));
 END LOOP;
END;

...
htp.init;
owa_util.mime_header('text/xml', false );		
htp.p( 'Content-Length: ' || dbms_lob.getlength( myfile ) );					
htp.p( 'Content-disposition: attachment; filename="'||c0_filename||'.xml";' );	
owa_util.http_header_close;
wpg_docload.download_file(myfile);
htmldb_application.g_unrecoverable_error := true;
--apex_application.stop_apex_engine; 
...

function downloadFiles () {
	var arrf30 = new Array();
	arrf30 = document.getElementsByName("f30");


	for (var i=0; i < arrf30.length;i++) {
		var getFile = new htmldb_Get(null, $v('pFlowId'),'APPLICATION_PROCESS=DOWNLOAD_FILE', 0);
		getFile.addParam('x01',arrf30[i].value);
		getFile.GetAsync(function(pResponse){
			if(pResponse.readyState==4 && pResponse.status==200){
				console.log('Success');
			};
		});
		getFile=null;
	};

};

BEGIN
 cher_sp.load_ndfl6.download_file(TO_NUMBER(APEX_APPLICATION.G_x01));
END;

BEGIN
 cher_sp.load_ndfl6.download_file(TO_NUMBER(:TMP_ID));
END;

function downloadFiles () {
	var arrf30 = new Array();
	arrf30 = document.getElementsByName("f30");
	for (var i=0; i < arrf30.length;i++) {
		window.open("f?p="+$v(pFlowId)+":0:"+$v(pInstance)+".:APPLICATION_PROCESS=DOWNLOAD_FILE:::TMP_ID:"+arrf30[i].value);
	};
};

BEGIN
 cher_sp.load_ndfl6.download_file(APEX_APPLICATION.G_x01);
 END;

function downloadFiles () {
	var arrf30 = new Array();
	arrf30 = document.getElementsByName("f01");
	for (var i=0; i < arrf30.length;i++) 
	{	var getFile = new htmldb_Get(null, $v('pFlowId'),'APPLICATION_PROCESS=DOWNLOAD_FILE', 0);
	    getFile.addParam("x01",arrf30[i].value);
	    window.open(getFile.url());
	}
};

function downloadFiles () {
	var arrf30 = new Array();
	var str = ""
	arrf30 = document.getElementsByName("f01");
	for (var i=0; i < arrf30.length;i++) 
	{str = str+" "+arrf30[i].value}
	document.write(str);
};

function downloadFiles () {
	var arrf30 = new Array();
	arrf30 = document.getElementsByName("f01");
	for (var i=0; i < arrf30.length;i++) 
    if (arrf30[i].checked)
	{	var getFile = new htmldb_Get(null, $v('pFlowId'),'APPLICATION_PROCESS=DOWNLOAD_FILE', 0);
	    getFile.addParam("x01",arrf30[i].value);
	    window.open(getFile.url());
	    document.write("ololo");
	}
};

function downloadFiles () {
	var arrf30 = new Array();
	arrf30 = document.getElementsByName("f01");
	for (var i=0; i < arrf30.length;i++) 
    if (arrf30[i].checked)
	{  var getFile = new htmldb_Get(null, $v('pFlowId'),'APPLICATION_PROCESS=DOWNLOAD_FILE', 0);
	    getFile.addParam('x01',arrf30[i].value);
	    window.open(getFile.url());
	    getFile = null;	
	}
};

begin
...
myfile := utl_i18n.string_to_raw(txt,'CL8MSWIN1251');

htp.init;
owa_util.mime_header('text/xml', false );    
htp.p( 'Content-Length: ' || dbms_lob.getlength( myfile ) );          
htp.p( 'Content-disposition: attachment; filename="'||c0.filename||'.xml";' );  
owa_util.http_header_close;
wpg_docload.download_file(myfile);
htmldb_application.g_unrecoverable_error := true;
--apex_application.stop_apex_engine; 

end;