function switchPage(pageId) {
	var pbs = document.getElementsByTagName("div");
	var tabs = document.getElementsByTagName("li");
	
    for (i = 0; i < pbs.length; i++) {
        if (pbs[i].className == "bodyPage") {
        
        	if (pbs[i].id == pageId) {
        		showPage(pbs[i]);
        		selectTab("tab_"+pageId);
        	}
        	else {
        		hidePage(pbs[i]);
        		unselectTab("tab_"+pbs[i].id);
        	}
        }
    }
    
    for (i = 0; i < tabs.length; i++) {
        if (tabs[i].className == "bodyPage") {
        
        	if (tabs[i].id == "tab_"+pageId) selectTab(tabs[i]);
        	else unselectTab(tabs[i]);
        }
    }
}

function selectTab(tabId) {
	var tab = document.getElementById(tabId);
	
	tab.className="selected";
}

function unselectTab(tabId) {
	var tab = document.getElementById(tabId);
	
	tab.className="unselected";
}

function showPage(page) {
	page.style.display='block';
}

function hidePage(page) {
	page.style.display='none';
}