function tabMenu() {
    if (!document.getElementById("tabs"))
        return;

    var menuItem = document.getElementById("tabs").getElementsByTagName('li');
    for (var i=0;i<menuItem.length; i=i+1 )
	{
	    menuItem[i].onclick=function()
	    {
	        var tab; 
	        for (var i=0;i<menuItem.length; i=i+1 )
	        {
	            tab = document.getElementById(menuItem[i].id+"_tab"); 
	            menuItem[i].className="";
	            tab.className="hidden-tab";
	        }
	        this.className="active";  
            tab = document.getElementById(this.id+"_tab"); 	             
	        tab.className="visible-tab";
	        
	        // for ie6 it's needed to refresh position
	        if (('\v' == 'v') && navigator.userAgent.indexOf("MSIE 6.0")>=0)
	        {
	           var footer=document.getElementsByTagName("div");
	           for (var i=0;i<footer.length; i=i+1 )
	           {
	               if (footer[i].className=="footer") 
	               {
	                   footer[i].style.position = "relative";
                       footer[i].style.position = "absolute";
                       return;
                   }
	           }
	        }
	        return false;
	    }
	}
}

function first_time() {
    if (!document.getElementById("tabs"))
        return;

    var menuItem = document.getElementById("tabs").getElementsByTagName('li');
    
    menuItem[0].className="active"
    for (var i=1;i<menuItem.length; i=i+1 )
    {
        tab = document.getElementById(menuItem[i].id+"_tab"); 
        menuItem[i].className="";
        tab.className="hidden-tab"; 
    }
}

first_time();
tabMenu();