pixs = new Array();
for (i=0;i<20;i++) {
	pixs[i] = 1;
}
 taihi=new Array();

function hyouji(doko,js_obj){
	if(document.layers){
		if (doko==1 || doko==2 || doko==6) {
			if (pixs[doko]==1) {
				// --document["title"+doko].document["title"+doko].document.images["pict"+doko].src = "menu_images/minus.gif";
				// --pixs[doko]=0;
			}else{
				// --document["title"+doko].document["title"+doko].document.images["pict"+doko].src = "menu_images/plus.gif";
				// --pixs[doko]=1;
			}
	}
	 kazu=document.layers.length/2;
      lay_name=document.layers["lay"+doko];
      tit_name=document.layers["title"+doko];
     if(lay_name.visibility=='show') {
     	lay_name.visibility='hidden';
          dotti=1;
     }else {
     	lay_name.visibility='show';
       	tate=tit_name.pageY+tit_name.clip.height;
       	yoko=tit_name.pageX;
       	lay_name.top=tate;
       	lay_name.left=yoko;
       	dotti=0;
	}
	if(doko<kazu-1){
		for(i=doko+1; i<kazu; i++){
			tate=document.layers["lay"+doko].clip.height;
			if(dotti==1)
				document.layers["title"+i].moveBy(0,-tate);
			else
				document.layers["title"+i].moveBy(0,tate);
             	if(document.layers["lay"+i].visibility=='show'){
                  	if(dotti==1)
					document.layers["lay"+i].moveBy(0,-tate);
                   else 
					document.layers["lay"+i].moveBy(0,tate);
			}
           }
     }
	}
	else if((document.getElementById) && navigator.appName.indexOf("Netscape")!=-1){
		lay_name=document.getElementById("lay"+doko);
         	if(lay_name.style.visibility=='visible'){
         		lay_name.style.visibility='hidden';
              	lay_name.style.display="none";
		}else {
			lay_name.style.visibility='visible';	
			lay_name.style.display="block";
		}
	}
     else if(document.all){
                     lay_name=document.all("lay"+doko);
                     if(lay_name.style.visibility=='visible')
                             {lay_name.style.visibility='hidden';
                              lay_name.style.display="none";
                              if(navigator.appVersion.indexOf("MSIE 4.")!=-1)
                                     lay_name.innerHTML=taihi[doko];
                             }
                      else {lay_name.style.visibility='visible';
                            lay_name.style.display="block";
                             taihi[doko]=lay_name.innerHTML;
                            if(navigator.appVersion.indexOf("MSIE 4.")!=-1)
                                     lay_name.innerHTML=""+taihi[doko];
                             }
                     }

	if (doko==1 || doko==3 || doko==7) {
		if (pixs[doko]==1) {
			// --document.images["pict"+doko].src = "menu_images/minus.gif";
			// --pixs[doko]=0;
		}else{
			// --document.images["pict"+doko].src = "menu_images/plus.gif";
			// --pixs[doko]=1;
		}
	}
}
       if(document.layers){
       	document.write('<style type="text/css">span{position:absolute;visibility:hidden;};div{position:relative}</style>');
       }
       else if((document.getElementById) && navigator.appName.indexOf("Netscape")!=-1){
       	document.write('<style type="text/css">span{position:relative;display:none;}</style>');
       }
       else if(document.all){
       	document.write('<style type="text/css">span{position:relative;display:none;}</style>');
       }