NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
NS6 = (document.getElementById) ? 1 : 0;
ver4 = (NS4 || IE4) ? 1 : 0;

function show(layername) {
	hideall();
  	if (NS4) {document.layers[layername].display = "block";}
	else if (NS6) {document.getElementById(layername).style.display = "block";}
  	else {document.all[layername].style.display = "block";}
}

function hideall() {
	hide('1');
	hide('2');
	hide('3');
	hide('4');
	hide('5');
	hide('6');
	hide('7');
	hide('8');
}

function hide(layername) {
	if (NS4) {if (document.layers[layername]) {document.layers[layername].display = "none";}}
	else if (NS6) {if (document.getElementById(layername)) {document.getElementById(layername).style.display = "none";}}
	else {if (document.all[layername]) {document.all[layername].style.display = "none";}}
}

function checkBrowser(){
	this.ver=navigator.appVersion
	this.dom=document.getElementById?1:0
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
	this.ie4=(document.all && !this.dom)?1:0;
	this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;
	this.ns4=(document.layers && !this.dom)?1:0;
	this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5)
	return this
}
bw=new checkBrowser()

function showhide(div,action,nest){
	obj=bw.dom ? document.getElementById(div).style : bw.ie4?document.all[div].style : bw.ns4 ? nest ? document[nest].document[div] : document[div] : 0; 
	if(action=='on') {
		obj.display='block';
	} else {
		obj.display='none';
	}
}

function admin_menu(div,action,nest){
	obj=bw.dom?document.getElementById(div).style:bw.ie4?document.all[div].style:bw.ns4?nest?document[nest].document[div]:document[div]:0; 
	if(obj.display=='block' || obj.display=='block') {
		obj.display='none';
	} else {
		obj.display='block';
	}
}

function noneBlock(layername) {
	if (NS4) {
		if (document.layers[layername].display == "none")
			document.layers[layername].display = "block";
		else {
			document.layers[layername].display = "none";
		}
	}
	else if (NS6) {
		if (document.getElementById(layername).style.display == "none")
			document.getElementById(layername).style.display = "block";
		else {
			document.getElementById(layername).style.display = "none";
		}
	}
	else {
		if (document.all[layername].style.display == "none")
			document.all[layername].style.display = "block";
		else {
			document.all[layername].style.display = "none";
		}
	}
}