function nav_style(x)
	{
		
		if(x=="1")
			{
				
				document.getElementById("first").style.display=""
				document.getElementById("second").style.display="none"
				document.getElementById("third").style.display="none"
				document.getElementById("fourth").style.display="none"
				document.getElementById("fifth").style.display="none"
				document.getElementById("sixth").style.display="none"
				document.getElementById("seventh").style.display="none"
			
			}
			
		if(x=="2")
			{
				document.getElementById("first").style.display="none"
				document.getElementById("second").style.display=""
				document.getElementById("third").style.display="none"
				document.getElementById("fourth").style.display="none"
				document.getElementById("fifth").style.display="none"
				document.getElementById("sixth").style.display="none"
				document.getElementById("seventh").style.display="none"
				
			}
		
		if(x=="3")
			{	
				document.getElementById("first").style.display="none"
				document.getElementById("second").style.display="none"
				document.getElementById("third").style.display=""
				document.getElementById("fourth").style.display="none"
				document.getElementById("fifth").style.display="none"
				document.getElementById("sixth").style.display="none"
				document.getElementById("seventh").style.display="none"
				

			}
		if(x=="4")
			{	
				document.getElementById("first").style.display="none"
				document.getElementById("second").style.display="none"
				document.getElementById("third").style.display="none"
				document.getElementById("fourth").style.display=""
				document.getElementById("fifth").style.display="none"
				document.getElementById("sixth").style.display="none"
				document.getElementById("seventh").style.display="none"
			

			}
		if(x=="5")
			{	
				document.getElementById("first").style.display="none"
				document.getElementById("second").style.display="none"
				document.getElementById("third").style.display="none"
				document.getElementById("fourth").style.display="none"
				document.getElementById("fifth").style.display=""
				document.getElementById("sixth").style.display="none"
				document.getElementById("seventh").style.display="none"
				
			}
		if(x=="6")
			{	
				document.getElementById("first").style.display="none"
				document.getElementById("second").style.display="none"
				document.getElementById("third").style.display="none"
				document.getElementById("fourth").style.display="none"
				document.getElementById("fifth").style.display="none"
				document.getElementById("sixth").style.display=""
				document.getElementById("seventh").style.display="none"
			
			}
		if(x=="7")
			{	
				document.getElementById("first").style.display="none"
				document.getElementById("second").style.display="none"
				document.getElementById("third").style.display="none"
				document.getElementById("fourth").style.display="none"
				document.getElementById("fifth").style.display="none"
				document.getElementById("sixth").style.display="none"
				document.getElementById("seventh").style.display=""
			
			}

		}