var menuStatus			= Array();
	   
	   
	   function d(docElement){
	   		return document.getElementById(docElement);
	   }
	   
	   
	   function hideDisplayMenu(contentType){
	   		
	   		for(key in menuStatus){
	   			if(key != contentType){
		   			if(menuStatus[key] == true){
		   				menuStatus[key]	= false;
		   				d('mainMenu' + key).style.display = "none";
		   				rolloverMenuHeader(key, "off");
		   			}
	   			}
	   		}
	   		
	   		if(menuStatus[contentType]){
	   			var mode = "none";
	   			menuStatus[contentType]	= false;
	   		}
	   		else{
	   			var mode = "block";
	   			menuStatus[contentType]	= true;
	   		}
	   		
	   		d('mainMenu' + contentType).style.display = mode;
	   }
	   

	   var defaultMenuHeaderClass	= "mainMenuHeaderOption";
	   
	   function rolloverMenuHeader(contentType, mode){
	   		if(!menuStatus[contentType]){
		   		if(mode=="on"){
		   			oldMenuHeaderClass	= d('menuHeader' + contentType).className;
		   			d('menuHeader' + contentType).className	= oldMenuHeaderClass + " " + contentType + "Colour";
		   		}
		   		else{
		   			if(oldMenuHeaderClass=="")	oldMenuHeaderClass	= defaultMenuHeaderClass;
		   			d('menuHeader' + contentType).className	= oldMenuHeaderClass;
		   		}
		   		
		   	}
		}