回答編集履歴
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加筆
test
CHANGED
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@@ -1,4 +1,4 @@
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1
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以下のselectを取得している部分を
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1
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以下のselectを取得している部分を
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2
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3
3
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``` javascript
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4
4
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@@ -15,6 +15,58 @@
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15
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var select1 = document.forms.formName.selectName3;
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var select2 = document.forms.formName.selectName4;
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```
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以下のように動的にすれば、コードの一本化ができます。
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合わせてHTMLも修正してください。
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``` javascript
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function select(_parentSelect, _childSelect)
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{
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var parentSelect = typeof _parentSelect === 'string' ? document.forms.formName[_parentSelect] : _parentSelect;
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var childSelect = document.forms.formName[_childSelect];
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childSelect.options.length = 0;
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if (parentSelect.options[parentSelect.selectedIndex].value == "TV")
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{
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childSelect.options[0] = new Option("SONY");
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childSelect.options[1] = new Option("PANA");
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childSelect.options[2] = new Option("TOSHI");
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}
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else if (parentSelect.options[parentSelect.selectedIndex].value == "PHONE")
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{
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childSelect.options[0] = new Option("APPLE");
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childSelect.options[1] = new Option("GOOGLE");
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childSelect.options[2] = new Option("ANDOROID");
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}
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}
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```
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72
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@@ -64,54 +116,6 @@
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116
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</body>
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-
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-
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119
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```
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120
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``` javascript
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function select(_parentSelect, _childSelect)
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{
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var parentSelect = typeof _parentSelect === 'string' ? document.forms.formName[_parentSelect] : _parentSelect;
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var childSelect = document.forms.formName[_childSelect];
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childSelect.options.length = 0;
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if (parentSelect.options[parentSelect.selectedIndex].value == "TV")
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{
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childSelect.options[0] = new Option("SONY");
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childSelect.options[1] = new Option("PANA");
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childSelect.options[2] = new Option("TOSHI");
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}
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else if (parentSelect.options[parentSelect.selectedIndex].value == "PHONE")
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{
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childSelect.options[0] = new Option("APPLE");
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childSelect.options[1] = new Option("GOOGLE");
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childSelect.options[2] = new Option("ANDOROID");
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}
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}
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116
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-
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117
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```
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