function XF_ChangeImage(src) {	
	var image;
	if (image = document.getElementById('large_image')) {
		image.src = src;		
	}
    
	return false;
}

function XF_ShowTab(index) {
	var selector;
	var lists;
	var ul;
	var links;
	var a;
	var tab;
	if (selector = document.getElementById('selector')) {		
		lists = selector.getElementsByTagName('ul');
		if (lists.length && lists.length > 0) {
			ul = lists[0];
			links = ul.getElementsByTagName('a');
			if (links && links.length) {
				for ( var i = 0; i < links.length; i++ ) {
					a = links[i];
					if (i == index) {
						a.className = 'current_tab';						
					} else {
						a.className = 'tab';
					}
				}				
			}			
		}
	}
	if (index == 0) {
		if (tab = document.getElementById('profile')) {
			tab.style.display = 'block';
		}
		if (tab = document.getElementById('photos')) {
			tab.style.display = 'none';
		}
	}
	if (index == 1) {
		if (tab = document.getElementById('profile')) {
			tab.style.display = 'none';
		}
		if (tab = document.getElementById('photos')) {
			tab.style.display = 'block';
		}
	}
	
	return false;
}

function XF_ShowMenu() {
    var menu;       
    if (menu = document.getElementById('groups')) {
        menu.style.display = 'block';        
    }
    var div;
    if (div = document.getElementById('dmain')) {
        div.className = 'hover';
    }    
    var a;
    if (a = document.getElementById('amain')) {
        a.className = 'hover';
    }     
}

function XF_HideMenu() {
    var menu;
    if (menu = document.getElementById('groups')) {
        menu.style.display = 'none';
    }
    var div;
    if (div = document.getElementById('dmain')) {
        div.className = 'none';
    }    
    var a;
    if (a = document.getElementById('amain')) {
        a.className = 'none';
    }      
}

function XF_ShowExplanations() {
    document.getElementById('features_wrapper').style.display = 'block';
}

function XF_HideExplanations() {
    document.getElementById('features_wrapper').style.display = 'none';
}