var bIsIE = document.all ? 1:0;
var bIsNS = document.layers ? 1:0;
var bIsDOM2 = document.getElementById ? 1:0;
var strSrc = 'gr/buttom/';
var buttons = new Array('topMenu00','topMenu02','topMenu03','topMenu04','topMenu05','topMenu06','topMenu07');
var buttonsLength = buttons.length;
var currentButton;
var hideLayer;
var showLayer;

function toggleTopMenu(objButton){
	for ( i = 0; i < buttonsLength; i++ ){
		currentButton = buttons[i];
		hideLayer = buttons[i] + 'ChildrenLayer';
		if ( !( objButton == buttons[i]) ){
			document.images[currentButton].src = strSrc + currentButton + 'b.gif';
			if (bIsIE){	
				document.all[hideLayer].style.visibility = 'hidden';
			}
			else if (bIsNS){
				document.layers[hideLayer].visibility = 'hide';
			}
			else if (bIsDOM2){
				
				document.getElementById(hideLayer).style.visibility = 'hidden';
			}
		}
	}
	showLayer = objButton + 'ChildrenLayer';
	//alert(showLayer);
	document.images[objButton].src = strSrc + objButton + 'a.gif';
	if (bIsIE){
		document.all[showLayer].style.visibility = 'visible';
	}
	else if (bIsNS){
		document.layers[showLayer].visibility = 'show';
	}
	else if (bIsDOM2){
		document.getElementById(showLayer).style.visibility = 'visible';
	}
}