var mainFlag='first';
var subFlag='1';

function showLAYER(layName){
if(document.layers)document.layers[layName].display='block';
if(document.all)document.all(layName).style.display='block';
if(document.getElementById)document.getElementById(layName).style.display = 'block'; //NN6,Mozilla,IE5—p
}
function hideLAYER(layName){
if(document.layers)document.layers[layName].display='none';
if(document.all)document.all(layName).style.display='none';
if(document.getElementById)document.getElementById(layName).style.display= 'none'; //NN6,Mozilla,IE5—p
}
function hideALL() {
hideLAYER('first1');
hideLAYER('second1');
hideLAYER('third1');
}

function changeViewTabu(arg_mainFlag,arg_subFlag){
	mainFlag=arg_mainFlag;
	subFlag=arg_subFlag;
	hideALL();
	showLAYER(mainFlag+subFlag);
}