var currentSection,currentLink;
currentSection = "";
currentLink = "";
function showHide(section){			
	
	if (currentSection != section){
	
		document.getElementById(section).style.display = "block";
		
		if 	(currentSection != ""){
				document.getElementById(currentSection).style.display = "none";	
		}
		
	} else {
		if (document.getElementById(currentSection).style.display == "none"){
			document.getElementById(currentSection).style.display = "block";
		} else {
			document.getElementById(currentSection).style.display = "none";
		}
		
	}
	currentSection = section;
}