// JavaScript Document

var base_domain = 'http://www.cjs.ne.jp/';
var id;
var image;
var name;
var num;
var flag;

function change( num ){

	if( num==1 ){
		id = 'leftCol';
		image = 'side_';
	}else{
		//id = 'leftCol' + num;
		//image = 'btn_left_menu_';
	}
	name = 'menu'+num;
	
	if ( document.getElementById ){
		obj = document.getElementById( id ).style.display;
	}else if ( document.all ){
		obj =document.all( id ).style.display;
	}else if ( document.layers ){
		obj =document.layers[ id ].display;
	}

	if(obj=='none') {flag = 2;}
	else {flag = 1;}
	
	inverse_display( id );
	inverse_image( name );
	
	if(num==1){
		inverse_main();
	}
	
}

function inverse_display( id ){

	if(flag==1){
		if ( document.getElementById ){
			document.getElementById( id ).style.display = 'none';
		}else if ( document.all ){
			document.all( id ).style.display = 'none';
		}else if ( document.layers ){
			document.layers[ id ].display = 'none';
		}
		
	}else if(flag==2){
		if ( document.getElementById ){
			document.getElementById( id ).style.display = 'block';
		}else if ( document.all ){
			document.all( id ).style.display = 'block';
		}else if ( document.layers ){
			document.layers[ id ].display = 'block';
		}
		
	}
	
}

function inverse_image( name ){

	images = new Image();
	if(flag==1){
		images.src = base_domain + 'search4/common/img/' + image + 'open.gif';
		images.alt = '開く';
		images.title = 'クリックするとメニューが開きます';
	}else if(flag==2){
		images.src = base_domain + 'search4/common/img/' + image + 'close.gif';
		images.alt = '閉じる';
		images.title = 'クリックするとメニューが閉じます';
	}
	
	document.getElementById( name ).src = images.src;
	document.getElementById( name ).alt = images.alt;
	document.getElementById( name ).title = images.title;
	
}

function inverse_main(){

	if(flag==1){
		document.getElementById( 'mainCol' ).style.width = '945px';
	}else if(flag==2){
		document.getElementById( 'mainCol' ).style.width = '720px';
	}
	
}