function tabtoggle(id)
	{
		if(id==1){
					document.getElementById("tab1").style.display = "inline";
					document.getElementById("tab2").style.display = "none";
					document.getElementById("tab3").style.display = "none";
					document.getElementById("tab4").style.display = "none";
					document.getElementById("tabmenu1").className = "btn1_hover";
					document.getElementById("tabmenu2").className = "btn2";
					document.getElementById("tabmenu3").className = "btn3";
					document.getElementById("tabmenu4").className = "btn4";
					}
					
		if(id==2){
					document.getElementById("tab2").style.display = "inline";
					document.getElementById("tab1").style.display = "none";
					document.getElementById("tab3").style.display = "none";
					document.getElementById("tab4").style.display = "none";
					document.getElementById("tabmenu2").className = "btn2_hover";
					document.getElementById("tabmenu1").className = "btn1";
					document.getElementById("tabmenu3").className = "btn3";
					document.getElementById("tabmenu4").className = "btn4";
					}
		if(id==3){
					document.getElementById("tab3").style.display = "inline";
					document.getElementById("tab2").style.display = "none";
					document.getElementById("tab1").style.display = "none";
					document.getElementById("tab4").style.display = "none";
					document.getElementById("tabmenu3").className = "btn3_hover";
					document.getElementById("tabmenu2").className = "btn2";
					document.getElementById("tabmenu1").className = "btn1";
					document.getElementById("tabmenu4").className = "btn4";
					}
		if(id==4){
					document.getElementById("tab4").style.display = "inline";
					document.getElementById("tab2").style.display = "none";
					document.getElementById("tab3").style.display = "none";
					document.getElementById("tab1").style.display = "none";
					document.getElementById("tabmenu4").className = "btn4_hover";
					document.getElementById("tabmenu2").className = "btn2";
					document.getElementById("tabmenu3").className = "btn3";
					document.getElementById("tabmenu1").className = "btn1";
					}
	}