我正在尝试设置表单验证 - 这是有效的 - 但仅限于奇数,如果输入偶数,例如部件号TEST和数量2然后警报将出现,如果您输入数量3,则表单将提交。有什么想法吗?
的Javascript
<script type="text/javascript">
function allnumeric(inputtxt)
{
var numbers = /^[0-9]+$/;
if(form2.qty.value.match(numbers) & (form2.product.value != ""))
{
return true;
}
else
{
alert('Please input numeric characters only or fill in the product field')
{
return false;
}
}
}
</script>
表格
<form id="form2" name="form2" method="post" action="booking-printlabel2.asp?insert=yes" onsubmit="return allnumeric()">
<input name="product" type="text" id="product" style="height:55px;font-size:30pt;" size="10"/>
<input name="qty" type="text" id="qty" style="height:55px;font-size:30pt;" size="3"/>
<input type="submit" name="Print Labels2" id="Print Labels2" value="Print Labels" style="height:55px;font-size:30pt;"/>
</form>
谢谢大家 - 这是错字,if(form2.qty.value.match(numbers) & (form2.product.value != "")) changed to if(form2.qty.value.match(numbers) && (form2.product.value != ""))
现在可以了。
答案 0 :(得分:1)
假设您正在定位html5:
<input name="qty" type="number" id="qty" style="height:55px;font-size:30pt;"/>
或者如果你真的想要输入type =&#34; text&#34;:
<input name="qty" type="text" id="qty" pattern="\d+" style="height:55px;font-size:30pt;"/>
另外,你有一个错字:
if(form2.qty.value.match(numbers) & (form2.product.value != ""))
应该是
if(form2.qty.value.match(numbers) && (form2.product.value != ""))
答案 1 :(得分:1)
在你的if条件中,你必须再添加一个if条件来检查奇数和偶数。你必须这样做:
if(form2.qty.value.match(numbers) & (form2.product.value != ""))
{
var num = form2.qty.value;
if(num%2 == 0) {
alert('Even number');
} else {
return true;
}
}
答案 2 :(得分:1)
function allnumeric(inputtxt)
{
var numbers = /^[0-9]+$/;
var qty = form2.qty.value;
if(qty.match(numbers) && (form2.product.value != ""))
{
if(qty & 1) // even number
return true;
else
alert('Even number');
return false;
}
else
{
alert('Please input numeric characters only or fill in the product field')
return false;
}
}
<form id="form2" name="form2" method="post" action="booking-printlabel2.asp?insert=yes" onsubmit="return allnumeric()">
<input name="product" type="text" id="product" style="height:55px;font-size:30pt;" size="10"/>
<input name="qty" type="text" id="qty" style="height:55px;font-size:30pt;" size="3"/>
<input type="submit" name="Print Labels2" id="Print Labels2" value="Print Labels" style="height:55px;font-size:30pt;"/>
</form>