本文介绍了如何使用Js填充下拉列表的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如何填充html子选择ddl根据父html选择ddl使用js
//父ddl有选项。
< ;药水值=数字>数字
<药水值=字母>字母
< potion value =OPERATOR> OPERATOR
//儿童ddl在js数组中有价值
numeric [数字 ] = [ 1\" ， 2， 3， 4， 5， 6， 7，...];
alphabetic [alphabetic] = [A，B，C，D，E，F，G，......];
OPERATOR [OPERATOR] = [+， - ，*，％，/，..];
//
how can i populate html child select ddl according parent html select ddl using js
//parent ddl have options.
<potion value="numeric">numeric
<potion value="alphabetic">alphabetic
<potion value="OPERATOR">OPERATOR
//child ddl have value in js array
numeric["numeric"]=["1","2","3","4","5","6","7",...];
alphabetic["alphabetic"]=["A","B","C","D","E","F","G",...];
OPERATOR["OPERATOR"]= ["+","-","*","%","/",..];
//
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