我进行了客户调查，其中一个部分要求用户按重要性顺序从1到5评价这些内容。
便利， 质量， 价钱， 回转， 沟通，
所以我有5个下拉框，我想在其中显示数字1到5减去已经选择的数字。
在阅读了有关stackoverflow的类似性质的问题并使用了一些答案来汇总一些代码到目前为止我已经设置了这个HTML：
<tr>
<td>
<center>
<select name="convenience" id="convenience" onChange="populateSelect()">
<option></option>
<option <?php if($convenience == 1){echo "SELECTED";}?> value="1">1</option>
<option <?php if($convenience == 2){echo "SELECTED";}?> value="2">2</option>
<option <?php if($convenience == 3){echo "SELECTED";}?> value="3">3</option>
<option <?php if($convenience == 4){echo "SELECTED";}?> value="4">4</option>
<option <?php if($convenience == 5){echo "SELECTED";}?> value="5">5</option>
</select>
</center>
</td>
<td>
<center>
<select name="quality" id="quality" onChange="populateSelect()">
</select>
</center>
</td>
<td>
<center>
<select name="price" id="price" onChange="populateSelect()">
</select>
</center>
</td>
<td>
<center>
<select name="turnaround" id="turnaround" onChange="populateSelect()">
</select>
</center>
</td>
<td>
<center>
<select name="communication" id="communication">
</select>
</center>
</td>
</tr>
这个Javascript函数：
function populateSelect(){
convenience=$('#convenience').val();
quality=$('#quality').val();
price=$('#price').val();
turnaround=$('#turnaround').val();
communication=$('#communication').val();
$('#quality').html('');
$('#price').html('');
$('#turnaround').html('');
$('#communication').html('');
//Check convenience selection and populate quality accordingly
if(convenience == 1){
$('#quality').append('<option>2</option>');
$('#quality').append('<option>3</option>');
$('#quality').append('<option>4</option>');
$('#quality').append('<option>5</option>');
}else if(convenience == 2){
$('#quality').append('<option>1</option>');
$('#quality').append('<option>3</option>');
$('#quality').append('<option>4</option>');
$('#quality').append('<option>5</option>');
}else if(convenience == 3){
$('#quality').append('<option>1</option>');
$('#quality').append('<option>2</option>');
$('#quality').append('<option>4</option>');
$('#quality').append('<option>5</option>');
}else if(convenience == 4){
$('#quality').append('<option>1</option>');
$('#quality').append('<option>2</option>');
$('#quality').append('<option>3</option>');
$('#quality').append('<option>5</option>');
}else if(convenience == 5){
$('#quality').append('<option>1</option>');
$('#quality').append('<option>2</option>');
$('#quality').append('<option>3</option>');
$('#quality').append('<option>4</option>');
}
//Check quality selection and populate quality accordingly
if(quality == 1 || convenience ==1){
$('#price').append('<option>2</option>');
$('#price').append('<option>3</option>');
$('#price').append('<option>4</option>');
$('#price').append('<option>5</option>');
}else if(quality == 2 || convenience ==2){
$('#price').append('<option>1</option>');
$('#price').append('<option>3</option>');
$('#price').append('<option>4</option>');
$('#price').append('<option>5</option>');
}else if(quality == 3 || convenience ==3){
$('#price').append('<option>1</option>');
$('#price').append('<option>2</option>');
$('#price').append('<option>4</option>');
$('#price').append('<option>5</option>');
}else if(quality == 4 || convenience ==4){
$('#price').append('<option>1</option>');
$('#price').append('<option>2</option>');
$('#price').append('<option>3</option>');
$('#price').append('<option>5</option>');
}else if(quality == 5 || convenience ==5){
$('#price').append('<option>1</option>');
$('#price').append('<option>2</option>');
$('#price').append('<option>3</option>');
$('#price').append('<option>4</option>');
}
//Check price selection and populate quality accordingly
if(price == 1 || quality == 1 || convenience == 1){
$('#turnaround').append('<option>2</option>');
$('#turnaround').append('<option>3</option>');
$('#turnaround').append('<option>4</option>');
$('#turnaround').append('<option>5</option>');
}else if(price == 2 quality == 2 || convenience == 2){
$('#turnaround').append('<option>1</option>');
$('#turnaround').append('<option>3</option>');
$('#turnaround').append('<option>4</option>');
$('#turnaround').append('<option>5</option>');
}else if(price == 3 quality == 3 || convenience == 3){
$('#turnaround').append('<option>1</option>');
$('#turnaround').append('<option>2</option>');
$('#turnaround').append('<option>4</option>');
$('#turnaround').append('<option>5</option>');
}else if(price == 4 quality == 4 || convenience == 4){
$('#turnaround').append('<option>1</option>');
$('#turnaround').append('<option>2</option>');
$('#turnaround').append('<option>3</option>');
$('#turnaround').append('<option>5</option>');
}else if(price == 5 quality == 5 || convenience == 5){
$('#turnaround').append('<option>1</option>');
$('#turnaround').append('<option>2</option>');
$('#turnaround').append('<option>3</option>');
$('#turnaround').append('<option>4</option>');
}
//Check turnaround selection and populate quality accordingly
if(turnaround == 1 || price == 1 || quality == 1 || convenience == 1){
$('#communication').append('<option>2</option>');
$('#communication').append('<option>3</option>');
$('#communication').append('<option>4</option>');
$('#communication').append('<option>5</option>');
}else if(turnaround == 2 || price == 2 || quality == 2 || convenience == 2){
$('#communication').append('<option>1</option>');
$('#communication').append('<option>3</option>');
$('#communication').append('<option>4</option>');
$('#communication').append('<option>5</option>');
}else if(turnaround == 3 || price == 3 || quality == 3 || convenience == 3){
$('#communication').append('<option>1</option>');
$('#communication').append('<option>2</option>');
$('#communication').append('<option>4</option>');
$('#communication').append('<option>5</option>');
}else if(turnaround == 4 || price == 4 || quality == 4 || convenience == 4){
$('#communication').append('<option>1</option>');
$('#communication').append('<option>2</option>');
$('#communication').append('<option>3</option>');
$('#communication').append('<option>5</option>');
}else if(turnaround == 5 || price == 5 || quality == 5 || convenience == 5){
$('#communication').append('<option>1</option>');
$('#communication').append('<option>2</option>');
$('#communication').append('<option>3</option>');
$('#communication').append('<option>4</option>');
}
}
但是你可以猜到它不起作用。我被困住了，无法找到解决方案。