怎么把初始化数组传给js从而实现动态效果 echo '<script language="javascript"> function changeopt(item) { alert("dsf"); str=document.form1; str.class_id.options.length=0; if(str.dep_id.selectedIndex!=0) { for(var i=0;i,a[item+1]); var num=str.class_id.options.length; str.class_id.options[num]=option; } } //for(i=0;i.value); } </script>'; require("config.php");//连接数据库 //$sql="select department.dep_id,department.dep_name,class.class_id,class.class_name from department,class"; //$sql.=" where (department.dep_id=class.dep_id) order by department.dep_id"; $i=0; $sql="select * from department order by dep_id"; $result=mysql_query($sql) or die("失败"); while($data=mysql_fetch_object($result)) { $dep_id=$data->dep_id; $dep_name=$data->dep_name;//初始化系部数组 $arr_dep_id[$i]=$dep_id; //echo $arr_dep_id[$i];echo "
"; $arr_dep_name[$i]=$dep_name; //print_r( $arr_dep_name[$i]); $i++; } $j=0; $sql="select class.class_id,class.class_name from department,class"; $sql.=" where (department.dep_id=class.dep_id) order by department.dep_id"; $result2=mysql_query($sql) or die ("失败"); while($data2=mysql_fetch_object($result2)) { $class_id= $data2->class_id; $class_name=$data2->class_name; $arr_class_id[$j]=$class_id; //初始化班级数组 $arr_class_name[$j]=$class_name; //echo $arr_class_id[$j]; //echo $arr_class_name[$j]; $j++; } echo '