js 控制div的隱藏與顯示

function show(type)
{
document.getElementById("mark").value=type;


if(type==1)
{
var judge=document.getElementById("d_judge");
var r="block";

if(judge.style.display == "block")
{
r="none";
}
if(judge.style.display == "none")
{
r="block";
}
judge.style.display = r;
}
if(type==2)
{
var sinslc=document.getElementById("d_sigslc");
var r="block";


if(sinslc.style.display == "block")
{
r="none";
}
if(sinslc.style.display == "none")
{
r="block";
}
sinslc.style.display = r;
}
if(type==3)
{
var mulslc=document.getElementById("d_mulslc");
var r="block";

if(mulslc.style.display == "block")
{
r="none";
}
if(mulslc.style.display == "none")
{
r="block";
}
mulslc.style.display = r;
}
}