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Javascript method to delete html: 1. Delete nodes through removeChild; 2. Delete the option at the specified index through remove; 3. Delete rows and cells in the table through deleteRow and deleteCell.
The operating environment of this article: windows7 system, javascript1.8.5&&html5 version, DELL G3 computer
JavaScript delete HTML element
<body id="test"> <input id="add" type="button" value="增加" disabled onclick="add();"/> <input id="del" type="button" value="删除" onclick="del();"/> <p id="target" style="width:240px;height:50px;border:1px solid black"> 被控制的目标元素 </p> <script> var body = document.getElementById("test"); var target = document.getElementById("target"); var add = function(){ body.appendChild(target); document.getElementById("add").disabled="disabled"; document.getElementById("del").disabled=""; } var del = function(){ body.removeChild(target); document.getElementById("del").disabled="disabled"; document.getElementById("add").disabled=""; } </script></body>
RESULT
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<body id="test"> <input id="opValue" type="text" /> <input id="add" type="button" value="增加" onclick="add();"/> <input id="del" type="button" value="删除" onclick="del();"/> <select id="show" size="8" style="width:180px"></select> <script> var show = document.getElementById("show"); var add = function(){ var op = new Option(document.getElementById('opValue').value); show.options[show.options.length] = op; } var del = function(){ if (show.options.length>0){ show.remove(show.options.length-1); } } </script></body>
Result
<body > <input id="delrow" type="button" value="删除表格最后一行" onclick="delrow();"/> <input id="delcell" type="button" value="删除最后一行最后一格" onclick="delcell();"/><br /> 删除第<input id="row" type="text" size="2" />行, 第<input id="cel" type="text" size="2" />列 <input id="chg" type="button" value="删除" onclick="change()"/> <table id="test" border="1" style="width:500px ;"> <caption> java</caption> <tr> <td>1</td> <td>2</td> </tr> <tr> <td>3</td> <td>4</td> </tr> <tr> <td>5</td> <td>6</td> </tr> </table> <script> var tab = document.getElementById("test"); var delrow = function(){ if (tab.rows.length >0){ tab.deleteRow(tab.rows.length-1); } } var delcell = function(){ var rowList = tab.rows; var lastRow = rowList.item(rowList.length-1); if (lastRow.cells.length >0){ lastRow.deleteCell(lastRow.cells.length -1); } } var change = function(){ var tb = document.getElementById("test"); var row = document.getElementById('row').value; row = parseInt(row); if (isNaN(row)){ alert("请输入行整数"); return false; } var cel = document.getElementById('cel').value; cel = parseInt(cel); if (isNaN(cel)){ alert("请输入列整数"); return false; } if (row > tb.rows.length || cel> tb.rows[row-1].cells.length){ alert("要删除的不在"); return false; } tb.rows[row-1].deleteCell(cel-1); } </script></body>
Result
Recommended study: "javascript Advanced Tutorial》
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