function toggle(targetId){ 
  if (document.getElementById){ 
		target = document.getElementById(targetId); 
			 if (target.style.display == "none"){ 
					target.style.display = "block";
					target.style.visibility = "visible";
			 } else { 
					target.style.display = "none";
					target.style.visibility = "hidden";
		} 
	} 
}

function openTarget(targetId){ 
  if (document.getElementById){ 
	target = document.getElementById(targetId); 
		if (target.style.display == "none"){ 
			target.style.display = "block";
			target.style.visibility = "visible";
    }
	} 
}

function closeTarget(targetId){ 
  if (document.getElementById){ 
	target = document.getElementById(targetId); 
		if (target.style.display == "block"){ 
			target.style.display = "none";
			target.style.visibility = "hidden";
    }
	} 
}
function turnButtonOn(){
	closeTarget("menu_Dr_David");
	closeTarget("menu_pro_rohan");
	closeTarget("menu_dr_sidney");
	document.getElementById("but_Dr_David").className = "dr_david";
	document.getElementById("but_pro_rohan").className = "pro_rohan";
	document.getElementById("but_dr_sidney").className = "dr_sidney";
	
	if(turnButtonOn.arguments[0] == "but_Dr_David"){
		//document.getElementById(turnButtonOn.arguments[0]).className = "dr_david_on";
		openTarget(turnButtonOn.arguments[1]);
	}else if(turnButtonOn.arguments[0] == "but_pro_rohan"){
		//document.getElementById(turnButtonOn.arguments[0]).className = "off_road_bg_on";
		openTarget(turnButtonOn.arguments[1]);
	}else if(turnButtonOn.arguments[0] == "but_dr_sidney"){
		//document.getElementById(turnButtonOn.arguments[0]).className = "scooter_bg_on";
		openTarget(turnButtonOn.arguments[1]);
	}
}
function turnOffBold(){
	document.getElementById("but_David").style.fontWeight = 'normal';
	document.getElementById("but_rohan").style.fontWeight = 'normal';
	document.getElementById("but_sidney").style.fontWeight = 'normal';
}