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本文執行個體講述了javascript中DOM複選框選擇用法。分享給大家供大家參考。具體如下：
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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>複選框全選全清和反選</title> <script type="text/javascript"> //取得所有的複選框對象數組 function GetAllCheckBox() { var div = document.getElementById("Balls"); var inputs = div.getElementsByTagName("input"); //定義複選框數組，用來返回 var checkboxs = new Array(); var nIndex = 0; for (var i = 0; i < inputs.length; i++) { //通過type是否為checkbox來判斷複選框 if (inputs[i].type == "checkbox") { checkboxs[nIndex] = inputs[i]; nIndex++; } } return checkboxs; } //全選 function selAll() { var checkboxs = GetAllCheckBox(); for (var i = 0; i < checkboxs.length; i++) { checkboxs[i].checked = true; } } //全清 function clearAll() { var checkboxs = GetAllCheckBox(); for (var i = 0; i < checkboxs.length; i++) { checkboxs[i].checked = false; } } //反選 function reverseAll() { var checkboxs = GetAllCheckBox(); for (var i = 0; i < checkboxs.length; i++) { if (checkboxs[i].checked == true) { checkboxs[i].checked = false; } else { checkboxs[i].checked = true; } } } </script> </head> <body> <div id="Balls"> <input type="checkbox" id="c1" /><label for="c1">足球</label> <input type="checkbox" id="c2" /><label for="c2">撞球</label> <input type="checkbox" id="c3" /><label for="c3">乒乓球</label> <br /> <input type="button" value="全選" onclick="selAll()" /> <input type="button" value="全清" onclick="clearAll()" /> <input type="button" value="反選" onclick="reverseAll()" /> </div> </body> </html> |
希望本文所述對大家的javascript程式設計有所協助。
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