<div id=div1 style="display:block;width=200;height=200;background:#222222;"></div>
<input type=button onclick=show()>
<script>
var showmode=true;
function show(){
showmode=(showmode)?false:true;
if(showmode){
div1.style.display='block';
}
else{
div1.style.display='none';
}
}
</script>
<input type=button onclick=show()>
<script>
var showmode=true;
function show(){
showmode=(showmode)?false:true;
if(showmode){
div1.style.display='block';
}
else{
div1.style.display='none';
}
}
</script>
<script language=javascript>
function changeWin()
{
if (parent.frameset.cols == "40,*")
{
parent.frameset.cols = "0,*";
}
else
{
parent.frameset.cols = "40,*";
}
}
</script>