我在我的网站上运行了以下脚本。用户必须输入长度为10个字符的“testnumber”。有一个长度检查验证。当用户点击提交按钮时,我的脚本可以顺利运行。
但问题是当用户按下回车键而不是鼠标点击时,它不会警告用户。如何更改它以便当用户按下回车键时,此脚本将提供与单击提交按钮时相同的消息?
<script type="text/javascript">
function isNumber(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
}
function formvalidation(form) {
var isSubmitting = false;
var value = document.getElementById('testnumber').value;
if (value.length == 10) {
if (isNumber(value)) {
isSubmitting = true;
}
}
if (isSubmitting) {
form.submit();
}
else {
alert('testnumber must be at least 10 character.');
return false;
}
}
</script>
这是html代码的一部分:
<tr>
<td align="center">
<label>
<div align="left">
<span class="text7"><strong>enter testnumber:</strong></span>
<input name="testnumber" type="text" id="testnumber" size="50" value="<%=(testnumber)%>" />
<input name="search" id="search" type="button" class="normalmail" value="Search" onclick="formvalidation(frmSearch);" />
</div>
</label>
</td>
</tr>
答案 0 :(得分:3)
希望这会有所帮助
<from onsubmit="return formvalidation()">
<tr>
<td align="center">
<label>
<div align="left">
<span class="text7"><strong>enter testnumber:</strong></span>
<input name="testnumber" type="text" id="testnumber" size="50" value="<%=(testnumber)%>" />
<input name="search" id="search" type="button" class="normalmail" value="Search" onclick="formvalidation(frmSearch);" />
</div>
</label>
</td>
<!-- </tr></tr> -->
</form>
你的剧本
<script type="text/javascript">
function isNumber(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
}
function formvalidation() {
var isSubmitting = false;
var value = document.getElementById('testnumber').value;
if (value.length > 10 && value.length < 10) {
alert('testnumber must be at least 10 character.');
return false
}
else if (isSubmitting) {
return true
}
else {
return false;
}
}
</script>