// Javascript
	
	function servicesOn(serv){
		if(serv==1){
					document.getElementById("imgrevision").setAttribute("src","images2/revision_on.jpg");
		}
		else if(serv==2){
					document.getElementById("imgquestion").setAttribute("src","images2/question_on.jpg");
		}
		else if(serv==3){
					document.getElementById("imgwriting").setAttribute("src","images2/writing_on.jpg");
		}
		else if(serv==4){
					document.getElementById("imgproject").setAttribute("src","images2/project_on.jpg");
		}
	}
	function servicesOff(serv){
		if(serv==1){
					document.getElementById("imgrevision").setAttribute("src","images2/revision_off.jpg");
		}
		else if(serv==2){
					document.getElementById("imgquestion").setAttribute("src","images2/question_off.jpg");
		}
		else if(serv==3){
					document.getElementById("imgwriting").setAttribute("src","images2/writing_off.jpg");
		}
		else if(serv==4){
					document.getElementById("imgproject").setAttribute("src","images2/project_off.jpg");
		}
	}