function zmenavyhledavani(box) {

  var sb_array = new Array();
  sb_array[0] = "1web";
  sb_array[1] = "1obrazky";
  sb_array[2] = "1katalog";


  var sb_form_array = new Array();
  sb_form_array[0] = "web";
  sb_form_array[1] = "obrazky";
  sb_form_array[2] = "katalog";

  
  var temp_s = 0;
  var temp_string = '';

  var i = 0;
  for(i = 0; i < sb_array.length; i++) {
    document.getElementById(sb_array[i]).className = "vybervyhledavani";
  }

  for(i = 0; i < sb_form_array.length; i++) {
  	if(document.getElementById(sb_form_array[i]).style.display == "block")
  	  temp_s = i;
  }

  switch(box) {
      case 'web':
      	  document.getElementById(sb_form_array[temp_s]).style.display = "none";
          document.getElementById(sb_array[0]).className = "zmenavyhledavani";
      	  document.getElementById(sb_form_array[0]).style.display = "block";    	  
      break;
      case 'obrazky':
      	  document.getElementById(sb_form_array[temp_s]).style.display = "none";
          document.getElementById(sb_array[1]).className = "zmenavyhledavani";
      	  document.getElementById(sb_form_array[1]).style.display = "block";    	  
      break;
      case 'katalog':
      	  document.getElementById(sb_form_array[temp_s]).style.display = "none";
          document.getElementById(sb_array[2]).className = "zmenavyhledavani";
      	  document.getElementById(sb_form_array[2]).style.display = "block";    	  
      break;
    }
}