function ztb1(i)
{	
	document.getElementById("a0").className='fz1';
	document.getElementById("a1").className='fz1';
	document.getElementById("a2").className='fz1';
	document.getElementById("a"+i).className='thenow1';
         document.getElementById("b0").style.display='none';
	document.getElementById("b1").style.display='none';
	document.getElementById("b2").style.display='none';
         document.getElementById("b"+i).style.display='';
}

function ztb(i)
{	
	document.getElementById("c0").className='fz1';
	document.getElementById("c1").className='fz1';
	document.getElementById("c2").className='fz1';
	document.getElementById("c3").className='fz1';
	document.getElementById("c"+i).className='thenow1';
         document.getElementById("d0").style.display='none';
	document.getElementById("d1").style.display='none';
	document.getElementById("d2").style.display='none';
	document.getElementById("d3").style.display='none';
         document.getElementById("d"+i).style.display='';
}

function ztb2(i)
{	
	document.getElementById("g0").className='fz1';
	document.getElementById("g1").className='fz1';
	document.getElementById("g2").className='fz1';
	document.getElementById("g"+i).className='thenow1';
         document.getElementById("h0").style.display='none';
	document.getElementById("h1").style.display='none';
	document.getElementById("h2").style.display='none';
         document.getElementById("h"+i).style.display='';
}

function ztb3(i)
{	
	document.getElementById("e0").className='fz1';
	document.getElementById("e1").className='fz1';
	document.getElementById("e2").className='fz1';
	document.getElementById("e3").className='fz1';
	document.getElementById("e"+i).className='thenow1';
         document.getElementById("f0").style.display='none';
	document.getElementById("f1").style.display='none';
	document.getElementById("f2").style.display='none';
	document.getElementById("f3").style.display='none';
         document.getElementById("f"+i).style.display='';
}

function bgxz(i)
{	
	document.getElementById("s0").className='fz1';
	document.getElementById("s1").className='fz1';
	document.getElementById("s2").className='fz1';
	document.getElementById("s3").className='fz1';
	document.getElementById("s4").className='fz1';
	document.getElementById("s5").className='fz1';
	document.getElementById("s6").className='fz1';
	document.getElementById("s"+i).className='thenow1';
         document.getElementById("z0").style.display='none';
	document.getElementById("z1").style.display='none';
	document.getElementById("z2").style.display='none';
	document.getElementById("z3").style.display='none';
	document.getElementById("z4").style.display='none';
	document.getElementById("z5").style.display='none';
	document.getElementById("z6").style.display='none';
         document.getElementById("z"+i).style.display='';
}

	function doZoom(size){
		var artibody = document.getElementById('artibody');
		if(!artibody){
			return;
		}
		var artibodyChild = artibody.childNodes;
		artibody.style.fontSize = size + 'px';
		//再对artibody div内的直接html节点设置fontSize属性
		for(var i = 0; i < artibodyChild.length; i++){
			if(artibodyChild[i].nodeType == 1){
				artibodyChild[i].style.fontSize = size + 'px';
			}
		}		
	}