function secBoard(n)
  {
    for(i=0;i<secTable.cells.length;i++)
      secTable.cells

[i].className="md_td01";
    secTable.cells[n].className="md_td00";
    for(i=0;i<mainTable.tBodies.length;i++)
      mainTable.tBodies

[i].style.display="none";
    mainTable.tBodies

[n].style.display="block";
  }

var docBody=null;
function zoomDoc(size){
	if(!docBody){
		return;
	}	
	docBody.style.fontSize = size + 'px';
	var __childs = docBody.childNodes;
	for(var i=0;i<__childs.length;i++)
	{
		if(__childs[i].nodeType==1)
		{
			__childs[i].style.fontSize=size + 'px';
		}
	}
}