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最終形
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <script> | |
| /* | |
| DOMを使って動的にフォームを作り出すサンプル | |
| */ | |
| window.onload = function(){ | |
| var vbody = document.body | |
| , vform = createElement("form",vbody) | |
| , vbox = [] | |
| , vbutton | |
| , vdiv | |
| ; | |
| // 身長入力用BOX | |
| vbox["height"] = createElement("input",vform | |
| ,{id:"height",type:"text",placeholder:"身長(cm)"} | |
| ); | |
| // 体重入力用BOX | |
| vbox["weight"] = createElement("input",vform | |
| ,{id:"weight",type:"text",placeholder:"体重(kg)"} | |
| ); | |
| // 実行ボタン | |
| vbutton = createElement("button",vform | |
| ,{id:"button",type:"button",innerText:"exec"} | |
| ); | |
| // 結果表示領域 | |
| vdiv = createElement("div",vbody | |
| ,{id:"display",innerText:"ここに表示します"} | |
| ); | |
| vbutton.addEventListener("click",function() { | |
| var bmi = calcBMI(+vbox["height"].value, +vbox["weight"].value); | |
| var message = "あなたのBMI値は" + bmi; | |
| if (bmi > 25 ) { | |
| message += "基準値を超えています"; | |
| } | |
| display.innerText = message; | |
| },false); | |
| }; | |
| function calcBMI(height, weight){ | |
| return (weight / (height * height / 10000)); | |
| } | |
| function createElement(tagName,parentNode,optProp){ | |
| var elem = document.createElement(tagName); | |
| for (var key in optProp) { | |
| elem[key] = optProp[key]; | |
| }; | |
| parentNode.appendChild(elem); | |
| return elem; | |
| } | |
| </script> |
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