function employee_block (section){
        if(document.getElementById('eb_title_'+section).className=="css_ep_title css_active"){
                document.getElementById('eb_title_'+section).className="css_ep_title";
                document.getElementById('eb_block_'+section).className="css_ep_block";
        }
        else {
                document.getElementById('eb_title_'+section).className="css_ep_title css_active";
                document.getElementById('eb_block_'+section).className="css_ep_block css_active";
        }
}