var ie=true;
var n=false;

function hideShowMenu(itemName, defaultState) { 
		var visible = true;

		if (ie) {			
			/* IE */											
			//style n'est pas defini sur l'objet parent
			itemObject = document.all(itemName).style;
			imageObject = document.all(itemName + "_img");
			if (imageObject.src.indexOf("plus.gif") > -1) {
				visible = false;
			}		
																																							
			if (visible) {
				itemObject.display = 'none';
				document.all(itemName + "_img").src="/images/btn_plus.gif";
			}	else {				
				itemObject.display = 'block';				
				document.all(itemName + "_img").src="/images/btn_min.gif";
			}
									
		} else if (n){			
			
			if (nv == 4){								
					/* Netscape 4 */
					//eval("document." + itemName + ".visibility='hide'");
			}	else {
					/* Netscape 6.0 et + */
					itemObject = document.getElementById(itemName).style;
					
					if (document.images[itemName + "_img"].src.indexOf("plus.gif") > -1) {
						visible = false;
					}						
																																																																		
					if (itemObject.display == "none" || visible == false) {
						itemObject.display = "block";		
						document.images[itemName + "_img"].src = "/images/btn_min.gif";				
					} else {
						itemObject.display = "none";					
						document.images[itemName + "_img"].src = "/images/btn_plus.gif";	
					}
					
			}				
		}	
}