function menuSelect(num,colour)
	{
		var iMax = 4;
		var bctl = document.getElementById("mainhead_d");
		bctl.style.borderColor=colour;
		displaySettings("mainhead_",num,iMax,colour);
		displaySettings("maintext_",num,iMax,null);
		displaySettings("mainpict_",num,iMax,null);
	}
	
	function subaSelect(nshow)
	{
		displaySettings("subatext",nshow,null);
	}
	
	function GotoPageSection(nshow)
	{
		var nclass = "subatext";
		displaySettings(nclass,nshow,null);
	}
	
	function GotoShowSection(nshow)
	{
		displaySettings("subcdiv",nshow,null);
		displaySettings("subcimg",nshow,null);
	}
	
	function displaySettings(nclass,nshow,colour)
	{
		var categ = nclass + "_";
		var nctl = document.getElementById(categ+nshow);
		if (nctl) 
		{
			nctl.style.display="inline";
			if (colour) nctl.style.color=colour;
		}
		for (var i=1; i<=99; i++)
		{
    		if (i!=nshow)
    		{
    			nctl = document.getElementById(categ+i);
    			if (nctl)
    				nctl.style.display="none"; 
    			else
    				break;
	    		}
		}
	}