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在我的網頁上。我想以兩種方式提交表格。 1）點擊一個圖像（說繼續） 2）點擊超鏈接？（這又是一個圖像）點擊超鏈接提交表格
我需要驗證我的表單。看到我的代碼如下
<table width="989" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td width="989" align="center" valign="top" style="text-align:left;"><table align="left" width="989" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="24" align="left" valign="top" background="../images/box-top-tile.jpg"><img src="../images/box-left-top.jpg" width="24" height="24" /></td>
<td width="941" align="left" valign="top" background="../images/box-top-tile.jpg"><img src="../images/box-top-tile.jpg" width="24" height="24" /></td>
<td width="24" align="right" valign="top" background="../images/box-top-tile.jpg"><img src="../images/box-right-top.jpg" width="24" height="24" /></td>
</tr>
<tr>
<td align="left" valign="top" background="../images/box-left-tile.jpg"><img src="../images/box-left-tile.jpg" width="24" height="24" /></td>
<td height="380" align="left" valign="top" bgcolor="#F9F9F9" style="vertical-align:top;"><table border="0" cellspacing="0" width="941" >
<tr>
<td width="44"></td>
<td style="vertical-align:top;"><!-- start left side-->
<form name="frm_signup1" action="signuppersonal" onSubmit="return frmvalidate();" method="post">
<table border="0" cellspacing="0" cellpadding="0" width="455" height="380" >
<tr>
<td class="signup-head" height="50" style="color:#FFFFFF;"> Create Your Profile: <span style="font-size:16px">Getting Started</span></td>
</tr>
<tr>
<td class="signup-box" style="padding-bottom:0px;">MY text.
<br>
<div style="float:left">
<input type="checkbox" name="read" id="id_read" />
I have read and would like to continue</div>
<div style="float:right">
<input type="image" src="../images/site/continue.png" border="0" />
<input type="hidden" name="frm_submit" value="1" />
</div></td>
</tr>
<tr>
<td height="50" style="background-image:url(../images/site/box-grey.png); background-repeat:no-repeat"></td>
</tr>
</table>
</form></td>
<td width="50"></td>
<td width="355" style="text-align:right; vertical-align:top"><img src="../images/site/main-category.jpg" border="1" /> </td>
<td width="44"></td>
</tr>
<tr>
<td colspan="5"> </td>
</tr>
<tr>
<td colspan="5" align="center"><table border="0" cellpadding="0" align="center" cellspacing="0">
<tr>
<td width="30" align="left" style="vertical-align:middle"><img src="../images/site/right-arrow-disabled.png"></td>
<td style="border:1px solid #999999; width:300px;"><table border="0" cellspacing="0" cellspacing="0" height="20" >
<tr>
<td width="20" style="background-color:#CCCCCC"></td>
</tr>
</table></td>
<td width="30" style="text-align:right; vertical-align:middle"><a href="#" onclick="document.frm_signup1.submit();"><img src="../images/site/left-arrow.png" border="0"></a></td>
</tr>
</table></td>
</tr>
<tr>
<td colspan="5" height="25" style="text-align:center; vertical-align:bottom;" ><span style="font-size:16px; color:#000000;">Your Progress</span></td>
</tr>
</table></td>
<td height="380" align="right" valign="top" background="../images/box-right-tile.jpg"><img src="../images/box-right-tile.jpg" width="24" height="24" /></td>
</tr>
<tr>
<td align="left" valign="top" background="../images/box-btm-tile.jpg"><img src="../images/box-left-bottom.jpg" width="24" height="24" /></td>
<td align="left" valign="top" background="../images/box-btm-tile.jpg"><img src="../images/box-btm-tile.jpg" width="24" height="24" /></td>
<td align="right" valign="top" background="../images/box-btm-tile.jpg"><img src="../images/box-right-bottom.jpg" width="24" height="24" /></td>
</tr>
</table></td>
</tr>
</table>
我的表單驗證工作時點擊圖像（即第一種方式）。但是，當我點擊超鏈接表單驗證不起作用。 看到我的表單驗證碼
<script type="text/javascript">
function frmvalidate(){
if(document.getElementById('id_read').checked == false){
alert('Please select the Checkbox');
return false;
}
return true;
}
</script>
請幫我
在此先感謝