function product(id)
	{
		if(id==1){
					document.getElementById("contenttab1").style.display = "block";
					document.getElementById("contenttab2").style.display = "none";
					document.getElementById("contenttab3").style.display = "none";
					document.getElementById("contenttab4").style.display = "none";
					document.getElementById("contenttab5").style.display = "none";
					document.getElementById("menu1").className = "selected";
					document.getElementById("menu2").className = "";
					document.getElementById("menu3").className = "";
					document.getElementById("menu4").className = "";
					document.getElementById("menu5").className = "";
					}
		if(id==2){
					document.getElementById("contenttab2").style.display = "block";
					document.getElementById("contenttab1").style.display = "none";
					document.getElementById("contenttab3").style.display = "none";
					document.getElementById("contenttab4").style.display = "none";
					document.getElementById("contenttab5").style.display = "none";
					document.getElementById("menu2").className = "selected";
					document.getElementById("menu1").className = "";
					document.getElementById("menu3").className = "";
					document.getElementById("menu4").className = "";
					document.getElementById("menu5").className = "";
					}
		if(id==3){
					document.getElementById("contenttab3").style.display = "block";
					document.getElementById("contenttab1").style.display = "none";
					document.getElementById("contenttab2").style.display = "none";
					document.getElementById("contenttab4").style.display = "none";
					document.getElementById("contenttab5").style.display = "none";
					document.getElementById("menu3").className = "selected";
					document.getElementById("menu1").className = "";
					document.getElementById("menu2").className = "";
					document.getElementById("menu4").className = "";
					document.getElementById("menu5").className = "";
					}
		if(id==4){
					document.getElementById("contenttab4").style.display = "block";
					document.getElementById("contenttab1").style.display = "none";
					document.getElementById("contenttab2").style.display = "none";
					document.getElementById("contenttab3").style.display = "none";
					document.getElementById("contenttab5").style.display = "none";
					document.getElementById("menu4").className = "selected";
					document.getElementById("menu1").className = "";
					document.getElementById("menu2").className = "";
					document.getElementById("menu3").className = "";
					document.getElementById("menu5").className = "";
					}
		if(id==5){
					document.getElementById("contenttab5").style.display = "block";
					document.getElementById("contenttab1").style.display = "none";
					document.getElementById("contenttab2").style.display = "none";
					document.getElementById("contenttab3").style.display = "none";
					document.getElementById("contenttab4").style.display = "none";
					document.getElementById("menu5").className = "selected";
					document.getElementById("menu1").className = "";
					document.getElementById("menu2").className = "";
					document.getElementById("menu3").className = "";
					document.getElementById("menu4").className = "";
					}
		
	}