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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>jQuery+JavaScript 实现 table 的增加和减少</title>
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<script language="javascript" src="jquery-1.7.1.min.js"></script>
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</head>
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<body>
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<table border="0" width="800" style="border-collapse:collapse;" id="tb1">
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<tr>
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<td><input type="file" name="pic[]" /></td>
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</tr>
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</table>
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<input type="button" id="add" value="+" /> <input type="button" id="minus" value="-" /> <input type="button" id="empty" value="清空" />
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<script type="text/javascript">
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$("#add").click(function(){
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$("#tb1").append('<tr><td><input type="file" name="pic[]" /></td></tr>');
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})
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$("#minus").click(function(){
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var tbl_rows = Math.round((document.getElementById('tb1').rows.length));
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if(tbl_rows>1) dealTableRows('tb1', 0, 1);
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})
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$("#empty").click(function(){
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$("#tb1").empty();
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})
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function dealTableRows(tbl_id, opt, cellnum, str){
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var tblObj = document.getElementById(tbl_id);
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var newRow,newCell;
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switch(opt){
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case 1:/* 增加一行 */
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newRow = tblObj.insertRow(tblObj.rows.length);
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for(var i=0; i<cellnum; i++){
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newCell = newRow.insertCell(newRow.cells.length);
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newCell.innerHTML = str[i];
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}
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break ;
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default :
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for(var j=0;j<cellnum;j++){
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tblObj.deleteRow(tblObj.rows.length-1);
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}
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break ;
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}
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}
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</script>
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</body>
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</html>
