numdivs=4

IE5=NN4=NN6=false
if(document.all)IE5=true
else if(document.layers)NN4=true
else if(document.getElementById)NN6=true

function tabInit() {
	showDiv(0)
}
function showDiv( which ) {
	for(i=0;i<numdivs;i++) 
	{
		if(NN4) eval("document.tab"+i+".visibility='hidden'")
		if(IE5) eval("document.all.tab"+i+".style.visibility='hidden'")
		if(NN6) eval("document.getElementById('tab"+i+"').style.visibility='hidden'")
		
		if(NN4) eval("document.button"+i+".visibility='visible'")
		if(IE5) eval("document.all.button"+i+".style.visibility='visible'")
		if(NN6) eval("document.getElementById('button"+i+"').style.visibility='visible'")
	}
	if(NN4) eval("document.tab"+which+".visibility='visible'")
	if(IE5) eval("document.all.tab"+which+".style.visibility='visible'")
	if(NN6) eval("document.getElementById('tab"+which+"').style.visibility='visible'")
	
	if(NN4) eval("document.button"+which+".visibility='hidden'")
	if(IE5) eval("document.all.button"+which+".style.visibility='hidden'")
	if(NN6) eval("document.getElementById('button"+which+"').style.visibility='hidden'")
}