回答編集履歴
1
chousei
test
CHANGED
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@@ -1 +1,56 @@
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1
1
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【3つのセレクトボックス】の方は３つめのセレクトの値を参照していないように見えます。
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3
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# 参考
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```html
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<script>
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document.addEventListener('submit',e=>{
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e.preventDefault();
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const t=e.target;
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const [x,y,z]=[t.elements['x'].value,t.elements['y'].value,t.elements['z'].value];
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const obj={
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"A":{"D":{"H":100,"I":200,"J":300},"E":1400,"F":1850,"G":2500},
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"B":{"D":1200,"E":1850,"F":2400,"G":2800},
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"C":{"D":2300,"E":2500,"F":2800,"G":3200},
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};
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const usp=new URLSearchParams();
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usp.append('x',x);
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usp.append('y',y);
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if(x.value=='' ||
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y.value=='' ||
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(obj[x][y] instanceof Object && z=='')
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){
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return false;
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}
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if(typeof obj[x][y]=="number"){
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usp.append('content',obj[x][y]);
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}else{
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usp.append('z',z);
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usp.append('content',obj[x][y][z]);
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}
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location.href='?'+usp.toString();
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});
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</script>
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<form id="form">
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<select name="x">
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<option value="">--</option>
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<option value="A">A</option>
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<option value="B">B</option>
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<option value="C">C</option>
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</select>
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<select name="y">
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<option value="">--</option>
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<option value="D">D</option>
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<option value="E">E</option>
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<option value="F">F</option>
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<option value="G">G</option>
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</select>
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<select name="z">
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<option value="">--</option>
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<option value="H">H</option>
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<option value="I">I</option>
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<option value="J">J</option>
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<option value="K">K</option>
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</select>
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<input type="submit" value="送信">
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</form>
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56
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```
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