function secBoard(button,div_layer,classname_on,default_class,n)
{
 for(i=0;i<document.getElementById(button).childNodes.length;i++){
	if(n.innerHTML==document.getElementById(button).childNodes[i].innerHTML){on_id=i}
 if(document.getElementById(button).childNodes[i].nodeName=="#text"){continue};
 document.getElementById(button).childNodes[i].className=default_class;
 n.className=classname_on;}
 for(i=0;i<document.getElementById(div_layer).childNodes.length;i++){
 if(document.getElementById(div_layer).childNodes[i].nodeName=="#text"){continue};
 document.getElementById(div_layer).childNodes[i].style.display="none";
 document.getElementById(div_layer).childNodes[on_id].style.display="block";}
 
}

//----------------------------------------------------------------------------------------------------
//¿ØÖÆ×ÖÌå´óС
//
//-----------------------------------------------------------------------------------------------------
function doZoom(size) {document.getElementById('zoom').style.fontSize = size + 'px'}