/*function on_f(s){
  if( s.value == 'Что ищем?')
    s.value = '';
}
function on_b(s){
  if( s.value == '')
    s.value = 'Что ищем?';
}*/ 

var entrance='closed';
var entrance_proc = 0;
var entrance_div;
var entrance_ex = 5;
function entrance_width(width){
  if(entrance_div)
  {
    if(width-parseInt(entrance_div.style.width)>entrance_ex){
      entrance_div.style.width= (parseInt(entrance_div.style.width)+entrance_ex) + 'px';
    }else if(parseInt(entrance_div.style.width)-width>entrance_ex){
      entrance_div.style.width= (parseInt(entrance_div.style.width)-entrance_ex) + 'px';
    }else{
      entrance_div.style.width = width+'px';
      entrance_proc = 0;
      return;
    }
    setTimeout('entrance_width('+width+')',entrance_ex);
  }
}

function entrance_change(){
  entrance_div = document.getElementById('entrance');
  if(entrance_div && entrance_proc==0)
  {
    if(!entrance_div.style.width){
      entrance_div.style.width='20px';
    }
    entrance_proc=1;
    if (entrance=='closed')
    {
      entrance_width(236);
      entrance='open';
    }else{
      entrance_width(20);
      entrance='closed';
    }
  }
}