function menutabs_showMenu(item_number) {
	
	var elements = getElementVar("menutab").getElementsByTagName('li');
 	
    for (var i=0; i<elements.length; i++) {
    	if(i == item_number) {
    		elements[i].setAttribute("id", "current");
    		var content_d = getElementVar("menutabs_content_" + i);
			if (content_d) {
    			content_d.style.display='block';
    			content_d.style.visibility = 'visible';
    		}
			
    	} else {
    		elements[i].removeAttribute("id");
    		var content_d = getElementVar("menutabs_content_" + i);
    		if (content_d) {
    			content_d.style.display='none';
    			content_d.style.visibility = 'hidden';
    		}
    	}
    }
    
    var item_number_element = getElementVar("menutab_item_number");
    if (item_number_element) {
    	item_number_element.value = item_number;
    }
	
}