자바스크립트 랜덤 키워드 노출

인기검색어 10개중 5개 랜덤 추출하여 노출한다.

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  var arrKwd = new Array();
  
  function randomKwd(_size) {
   var random_no = Math.floor(Math.random() * _size);
   var isNotValid = true;
   
   if ( _size >= 5 && arrKwd.length < 5 ) {
    for ( var i=0; i < arrKwd.length; i++ ) {
     if ( arrKwd[i] == _arrSupKwd[random_no] ) {
      isNotValid = false;
     }
    }
    
    if ( isNotValid ) {
     arrKwd.push(_arrSupKwd[random_no]);
    } else {
     randomKwd(_size);   
    }
   }
  }
  
  for ( var i=0; i < 5; i++ ) {
   randomKwd(_arrSupKwd.length);
  }
  
  var innerSearchText = "";
  for ( var i=0; i < arrKwd.length; i++ ) {
      var _class = "";
      if ( i == 4 ) {
       _class = "class=\"lst_m\"";
      }
      innerSearchText += '<a href="javascript:goStatMainKwd(\'' + arrKwd[i] + '\', ' + (i+1)+ ' ,\'BMB020' + (i+1) + '\');" ' + _class + '>' + arrKwd[i].substring(0,6) + '</a>';
  }

  document.write(innerSearchText);