function subMenu(){				
		var menuNodes = $('nav').childNodes;		
		var menuButtons = new Array();		
		for(var i=0; i<menuNodes.length; i++){
				if(menuNodes[i].tagName=='LI'){
						menuButtons.push(menuNodes[i]);
					}
			}
		
		menuButtons[0].getElementsByTagName('A')[0].className+=' first';
		
		//==========sub block width=========
		for(var i=0; i<menuButtons.length; i++){
				var subNodes = menuButtons[i].getElementsByTagName('UL');
				for(var j=0; j<subNodes.length; j++){					
					if(menuButtons[i].offsetWidth < 123){  // sub block min-width 							
						subNodes[j].style.width = '123px';								
					 }
					 else {subNodes[j].style.width = menuButtons[i].offsetWidth+'px'} // sub block width = button width	
				}			
			}	
	}	
	
setTimeout('subMenu()', 500);