function change_class(id, newClass) {
  identity=document.getElementById(id);
  identity.className=newClass;
}
function show_tab1(tab){

      var tabs = ["","top_cont_1","top_cont_2"];

        for(i=1; i < tabs.length; i++){
          var obj = document.getElementById(tabs[i]);
          change_class("ttab_nav_"+i, "tab_main_inactive")
          obj.style.display = "none";
        }
          
        var obj = document.getElementById("top_cont_"+tab);
        obj.style.display = "block";
        change_class("ttab_nav_"+tab, "tab_main_active")
      }
	  
	  
	  
	function change_class(id, newClass) {
  identity=document.getElementById(id);
  identity.className=newClass;
}
function show_tab_ks(tab){

      var tabs = ["","topks_cont_1","topks_cont_2"];

        for(i=1; i < tabs.length; i++){
          var obj = document.getElementById(tabs[i]);
          change_class("ttab_ks_nav_"+i, "tab_main_inactive_ks")
          obj.style.display = "none";
        }
          
        var obj = document.getElementById("topks_cont_"+tab);
        obj.style.display = "block";
        change_class("ttab_ks_nav_"+tab, "tab_main_active_ks")
      }
	
	
	  
	  
<!--
function isValid() {
 var mail=document.form1.email.value;
 if (mail.indexOf(' ')==-1 
      && 0<mail.indexOf('@')
      && mail.indexOf('@')+1 < mail.length
 ) return true;
 else alert ('Invalid email address!')
 return false;
}

function selectname() 
{ 
document.loginForm.login.select()
} 
function dologin(form,login_url)
{
	loginname = form.login.value.split("@");
	if(loginname[1])
		form.login.value=loginname[0];
}
//-->
<!-- 
function selecttext() 
{ 
document.form1.email.select()
} 
//--> 

<!--

function change_class_click(id, newClass) {
  identity=document.getElementById(id);
  identity.className=newClass;
}

	function show_tab_click(tab){

var tabs = ["","top_cont_click1","top_cont_click2","top_cont_click3","top_cont_click4","top_cont_click5","top_cont_click6","top_cont_click7","top_cont_click8"];

        for(i=1; i < tabs.length; i++){
          var obj = document.getElementById(tabs[i]);
          change_class_click("ttab_nav_click"+i, "tab_main_inactive_click")
          obj.style.display = "none";
        }
          
        var obj = document.getElementById("top_cont_click"+tab);
        obj.style.display = "block";
        change_class_click("ttab_nav_click"+tab, "tab_main_active_click")
      }
	  

//-->