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这是我正在尝试修改的管理考试。考试一个一个地显示问题，隐藏另一个当我按下一个答案时，如果答案是正确的，就在进入下一个问题之前，如果答案是正确的，按下的问题的背景会变成绿色，如果是红色错误的答案。

我想要什么：当用户按下错误答案时，我希望系统不仅为按下的按钮显示红色背景，而且使正确答案的背景变为绿色。以这种方式向用户展示正确答案是什么。如果我错过了代码，请告诉我。

PHP

 $orderbyrand = "SELECT * FROM management  
                ORDER BY rand(), `answer` ASC LIMIT 2";
   $rend_result=mysql_query($orderbyrand); 
   $k=1; 
   while($row_rand=mysql_fetch_array($rend_result)){
   $answerarry[$k]= $row_rand['answer'];
   $k++;}
      $answerarry['0'] = $answerarry_shuffle['0'];
      $answerarry['1'];
      $answerarry['2'];
     shuffle($answerarry);

if($answerarry_shuffle['0']==$answerarry[0])
  { $correcr_answer[0]=1; } else { $correcr_answer[0]=0; }
if($answerarry_shuffle['0']==$answerarry[1])
  { $correcr_answer[1]=1; } else { $correcr_answer[1]=0; }
if($answerarry_shuffle['0']==$answerarry[2])
  { $correcr_answer[2]=1; } else { $correcr_answer[2]=0; }

Javascript 

function change_question(quest_num,optionvalue,ans_div_num){

var hidediv = 'question_'+optionvalue;
var add_optionvalue = (Number(optionvalue)+Number(1));
var showdiv = 'question_'+add_optionvalue;
var noofques = document.getElementById('noofques').value;
var totalno = (Number(noofques)+Number(1));
var totalcount = document.getElementById('noofques').value=totalno;
if(quest_num==1){
var correct_answer = document.getElementById('optvalue').value;
var optinoresult_add = (Number(correct_answer)+Number(1));
var addoptvalue = document.getElementById('optvalue').value=optinoresult_add;
document.getElementById('answerdiv_'+ans_div_num+'_'+optionvalue).style.background='#bbd387';
}  else {
var correct_answer = document.getElementById('optvalue').value;
var optinoresult_add = (Number(correct_answer)+Number(0));
var addoptvalue = document.getElementById('optvalue').value=optinoresult_add;
if(ans_div_num!=0){
document.getElementById('answerdiv_'+ans_div_num+'_'+optionvalue).style.background='#dd5f5b'; }
}
}

HTML

 <div class="row-fluid answer">
        <div id="answerdiv_1_<?php echo $i; ?>" onClick="return change_question('<?php echo $correcr_answer[0]; ?>','<?php echo $i; ?>','1');" class="span12 show_cursor"><p><?php echo substr($answerarry[0],0,300);?></p></div>
      </div>
      <div class="row-fluid answer">
        <div  id="answerdiv_2_<?php echo $i; ?>" onClick="return change_question('<?php echo $correcr_answer[1]; ?>','<?php echo $i; ?>','2');" class="span12 show_cursor"><p><?php echo substr($answerarry[1],0,300);?></p> </div>
      </div>
      <div class="row-fluid answer">
        <div id="answerdiv_3_<?php echo $i; ?>" onClick="return change_question('<?php echo $correcr_answer[2]; ?>','<?php echo $i; ?>','3');" class="span12 show_cursor"><p><?php echo substr($answerarry[2],0,300);?></p> </div>
      </div>
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