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