使用js实现input输入框的增加

2022-09-07 12:35:05

<!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>JS点击添加input输入框</title>

<script type="text/javascript">
/****添加新条目***/
/******点击添加input输入框JS******/
function checkRowsLimit()
{
var rowLimit = 10;
var len=document.getElementById('filearea').rows.length;
if(len==rowLimit)
{
alert('抱歉，为了您主页美观，只能添加这么多条目了。');
return false;
}
else
{
return true;
}
}

function addNewRow()
{
var obj=document.getElementById('filearea');

var row=obj.insertRow(-1);
var c0=row.insertCell(0);
c0.innerHTML='<input type=text size="3" maxlength=8 name="question" value="" onpropertychange=changeFlagValue()> ：';
c0.align='right';

var c1=row.insertCell(1);
c1.innerHTML='<input type=text size=50 maxlength=50 name="answer" style="margin-left:1px;" value="" onpropertychange=changeFlagValue()>';
c1.align='left';

var c2=row.insertCell(2);
c2.innerHTML='<a href="javascript:void(0)" onclick="removeRow(this)">[删除]</a>';
changeFlag = true;
try
{
comm_set_page_height();
}
catch (e)
{
}
}
function removeRow(fontobj)
{
if(confirm("确定取消该项吗?"))
{
var obj=document.getElementById('filearea');
var n=fontobj.parentNode.parentNode.rowIndex;
obj.deleteRow(n);
}
}</script>
</head>
<body>
<table width="735" border="0" id="filearea">
<tr>
<td align=right>商品编号<input type="text" onpropertychange=changeFlagValue() maxLength=8 size=3 name=question /> ：</td>
<td align=left><input type="text" style="MARGIN-LEFT: 1px"
onpropertychange=changeFlagValue() maxLength=50 size=50 name=answer /></td>
<td><a href="#" onClick="if(checkRowsLimit()) {addNewRow();changeFlag=true}" title="点击后在上面添加的输入框">[添加条目]</a></td>
</tr>
</table>
</body>
</html>