function getNames(obj,name,tij) 
{ 
var p = document.getElementById(obj); 
var plist = p.getElementsByTagName(tij); 
var rlist = new Array(); 
for(i=0;i<plist.length;i++) 
{ 
if(plist[i].getAttribute("name") == name) 
{ 
rlist[rlist.length] = plist[i]; 
} 
} 
return rlist; 
} 

function butong_net(obj,name) 
{ 
var p = obj.parentNode.getElementsByTagName("td"); 
var p1 = getNames(name,"f","div"); 
for(i=0;i<p1.length;i++) 
{ 
if(obj==p[i]) 
{ 
p[i].className = "s"; 
p1[i].className = "dis"; 
} 
else 
{ 
p[i].className = ""; 
p1[i].className = "undis"; 
} 
} 
}