var curNav = ''; // the currently displayed navigator
	var curSubNav = ''; // the current sub-navigator
	var bNS = document.layers ? true:false;
	//alert(bNS);
	function showdiv(divID, navType){
		if(bNS){
			if(document.layers[divID]){
				document.layers[divID].visibility='show';
			}
			if(navType){
				if((document.layers[curNav])&&(curNav!=divID)){
					killMenus();
					document.layers[curNav].visibility='hide';
				}
				curNav = divID;
			}else{
				if((document.layers[curSubNav])&&(curSubNav!=divID)){
					//alert(curSubNav + ' hidden')
					document.layers[curSubNav].visibility='hide';
				}
				curSubNav = divID;
			}
		}else{
			if(document.all[divID]){
				document.all[divID].style.visibility='visible';
			}
			if(navType){
				if((document.all[curNav])&&(curNav!=divID)){
					killMenus();
					document.all[curNav].style.visibility='hidden';
				}
				curNav = divID;
			}else{
				//alert(document.all[curSubNav]);
				if((document.all[curSubNav])&&(curSubNav!=divID)){
					document.all[curSubNav].style.visibility='hidden';
				}
				curSubNav = divID;
			}
		}
		//alert('current main nav:' + curNav + '\ncurrent sub nav:' + curSubNav)
	}
	function killMenus(){
		if(bNS){
			if(document.layers[curNav]){
				document.layers[curNav].visibility='hide';
			}
			if(document.layers[curSubNav]){
				document.layers[curSubNav].visibility='hide';
			}
		}else{
			if(document.all[curNav]){
				document.all[curNav].style.visibility='hidden';
			}
			if(document.all[curSubNav]){
				document.all[curSubNav].style.visibility='hidden';
			}
		}
	}
	function killSubMenus(){
		if(bNS){
			if(document.layers[curSubNav]){
				document.layers[curSubNav].visibility='hide';
			}
		}else{
			if(document.all[curSubNav]){
				document.all[curSubNav].style.visibility='hidden';
			}
		}
	}
	
	function openWindow(url, height, width){
		var sParams = 'height='+height+',' 
            sParams = sParams + 'width='+width+',' 
            sParams = sParams + 'toolbar=yes,' 
            sParams = sParams + 'scrollbars=yes,' 
            sParams = sParams + 'directories=yes,' 
            sParams = sParams + 'location=yes,' 
            sParams = sParams + 'menubar=yes' 
            sParams = sParams + ',resizable=yes';
		var win = window.open(url,"memberwin",sParams,true);
	}