第二个选择选项未获得值

Question

请检查我的第二个选择框获取值，但不从第一个选择框中获取值。请检查我的代码，我错在哪里？

这是我的代码：

<select class='form-control' id=class_code name=class_code 
onchange='setTextField(this)'><option value=''>Select 
class</option>";
<option value=$row[class_code] >$row[class]</option>";
}
</select>
<input id='cls' type = 'hidden' name = 'cls' value = '' />
<script type='text/javascript'>
function setTextField(dddl) {
document.getElementById('cls').value = 
dddl.options[dddl.selectedIndex].text;
}
</script>
<select class='form-control' id=semester_id name=semester_id     
onchange='setTextField(this)'><option value=''>Select 
semester</option></select>
<input id='semm' type = 'hidden' name = 'semm' value = '' />
<script type='text/javascript'>
function setTextField(ddl) {
document.getElementById('semm').value = 
ddl.options[ddl.selectedIndex].text;
}
</script>

请检查我错在哪里。提前致谢:)

Answer 1

<select class='form-control' id=class_code name=class_code onchange='setTextField1(this)'>
<option value=''>Select class</option>";
<option value=$row[class_code]>$row[class]</option>";
</select>
<input id='cls' type = 'hidden' name = 'cls' value = '' />
<script type='text/javascript'>
function setTextField1(dddl) {
document.getElementById('cls').value = dddl.options[dddl.selectedIndex].text;
}   
</script>
<select class='form-control' id=semester_id name=semester_id onchange='setTextField(this)'>
<option value=''>Select semester</option>
<option value='1'>semester1</option>
</select>
<input id='semm' type = 'hidden' name = 'semm' value = '' />
<script type='text/javascript'>
function setTextField(ddl) {
document.getElementById('semm').value = ddl.options[ddl.selectedIndex].text;
}
</script>