function items_query_char_check(pageform,pagelang){
  pageform.parts.value = trim_space(pageform.parts.value);
  var vlength = pageform.parts.value.length;
  var vparts = pageform.parts.value;
  var vcount = 0;
  for(var i = 0;i < vlength;i++){
  ss = vparts.substr(i, 1);
  if(ss == "%"){
    vcount++;
  }
  }
  
  
  if(vlength == vcount){
    if(pagelang == "ZHT"){
      alert("不允許全部以%字元輸入查詢!");
    }
    
    if(pagelang == "ZHS"){
      alert("不允许全部以%字符输入查询!");
    }
    
    if(pagelang == "US"){
      alert("The string  can never be % character!");
    }
    
    pageform.parts.focus();
    return false;
  }
  
  if((vlength - vcount) < 2 || vlength < 2){ 
    if(pagelang == "ZHT"){
      alert("請至少輸入2位元有效字元查詢!");
    }
    
    if(pagelang == "ZHS"){
      alert("请至少输入2位有效字符查询!");
    }
    
    if(pagelang == "US"){
      alert("Please enter a valid two character!");
    }
    
    pageform.parts.focus();
    return false;
  }
  
  return true;
}