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动态添加表单两法:很多时候，不知道需要表单的数目，就需要能对表单进行数量的控制。收集了如下两个效果：
效果1:
HTML代码
<html>
<body>
<form name="form1">
<table id="tb1" border=0>
<tr><td><a href="#" onclick="return addFj()">添加附件</a></td></tr>
</table>
<input type="hidden" name="fjCnt" value="1" />
</form>
</body>
</html>
<script language="javascript">
function addFj()
{
var oTb = document.getElementById("tb1");
var oTr = oTb.insertRow(0);
var name = "thefilename"+document.form1.fjCnt.value;
document.form1.fjCnt.value=parseInt(document.form1.fjCnt.value)+1;
oTr.insertCell(0).innerHTML = "<input id='file' name='"+name+"' type=file style='width:400px;'> <input type=button value='删除'>"
return false;
}
function delFj(obj)
{
obj.parentElement.parentElement.removeNode(true);
return false;
}
</script>
***************************************************************************************
效果2:
HTML代码
<HTML>
<HEAD>
<STYLE TYPE="text/css">
<!--
.p9{ font-size: 9pt; font-family: 宋体 }
td {font-size: 9pt}
.tx {height: 16px; width: 30px; border-color: black black #000000; border-top-width: 0px; border-right-width: 0px; border-bottom-width: 1px; border-left-width: 0px; font-size: 9pt; background-color: #eeeeee; color: #0000FF}
.tx2 {height: 16px;border-top-width: 0px; border-right-width: 0px; border-bottom-width: 1px; border-left-width: 0px; font-size: 9pt; color: #0000FF; border-left-color:#000000; border-right-color:#000000; border-top-color:#000000; border-bottom-color:#000000}
.bt {border-left:1px solid #C0C0C0; border-top:1px solid #C0C0C0; font-size: 9pt; border-right-width: 1; border-bottom-width: 1; height: 16px; width: 80px; background-color: #EEEEEE; cursor: hand; border-right-style:solid; border-bottom-style:solid}
.tx1 { width: 400 ;height: 20px; font-size: 9pt; border: 1px solid; border-color: black black #000000; color: #0000FF}
-->
</STYLE>
<SCRIPT LANGUAGE="vbscript">
function addfile()
dim str
str="<table>"
if not IsNumeric (window.form1.filenum.value) then window.form1.filenum.value =1
for i=1 to window.form1.filenum.value
str=str&"<tr><td valign='middle'>文件"&i&":</td><td><input type='file' name='file"&i&"' class='tx1' value size='20'> 保存为<input type='text' name='file"&i&"' size='20' class='tx2'></td></tr>"
next
window.uptd.innerHTML =str&"</table>"
end function
</SCRIPT>
<SCRIPT LANGUAGE="JavaScript">
<!--
function Show()
{
var allnum =document.form1.filenum.value;//获取有几个file
for (i=0;i<allnum;i++)
{
alert("文件框的Name:file"+i);
}
return false;
}
//-->
</SCRIPT>
<TITLE></TITLE>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=gb2312"></HEAD>
<BODY BGCOLOR="#ffffff" CLASS="p9" onLoad="addfile()">
<FORM METHOD="post" NAME="form1" ACTION="savetofile.asp" ENCTYPE="multipart/form-data">
<TABLE BORDER="0" ALIGN="center" CELLPADDING="0" CELLSPACING="0">
<TR>
<TD><DIV ALIGN="center"><FONT COLOR="#0000ff" SIZE="5">保存到文件</FONT></DIV></TD>
</TR>
<TR>
<TD><TABLE WIDTH="750" BORDER="1" ALIGN="center" CELLPADDING="0" CELLSPACING="0" BORDERCOLOR="#111111" STYLE="BORDER-COLLAPSE: collapse">
<TR>
<TD HEIGHT="27" COLSPAN="2">上传
<INPUT NAME="filenum" CLASS="tx2" VALUE="1" SIZE="4">
个文件
<INPUT TYPE="button" NAME="Button" CLASS="bt" onClick="addfile" VALUE="设 定">
</TD>
</TR>
<TR>
<TD> <DIV ID="uptd"> </DIV></TD>
</TR>
<TR>
<TD HEIGHT="30" COLSPAN="2" ALIGN="middle">
<INPUT TYPE="Button" NAME="Button" CLASS="bt" VALUE="看看有几个框" onclick="Show()">
<INPUT TYPE="submit" NAME="Button" CLASS="bt" VALUE="上 传">
<INPUT TYPE="reset" NAME="Button" CLASS="bt" VALUE="重 置">
</TD>
</TR>
</TABLE></TD>
</TR>
</TABLE>
</FORM>
</BODY>
</HTML>
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