如何验证无线电场?必须检查它,如果没有检查,我希望显示一个 err_radio441 或一个警报。我读了一些关于检查的帖子,但我从名字中删除,因为我知道 ID 不起作用。我错过了 .checked 什么的。任何帮助,将不胜感激!
function validateForm() {
var primaryfullname=document.getElementById('primaryfullname').value.trim();
var birthdate=document.getElementById('birthdate').value.trim();
var radio441=document.getElementByName('radio441').value.trim();
var count=0;
if (primaryfullname.length==0) {
document.getElementById("err_primaryfullname").innerHTML="<br><span class='errorbar'>*You must enter a primary name</span>";
} else {
count++;
document.getElementById("err_primaryfullname").innerHTML="";
}
if (birthdate.length==0) {
document.getElementById("err_birthdate").innerHTML="<br><span class='errorbar'>*You must enter a primary birth date</span>";
} else {
count++;
document.getElementById("err_birthdate").innerHTML="";
}
if (radio441.length==0) {
document.getElementById("err_radio441").innerHTML="<br><span class='errorbar'>*You must select a gender</span>";
} else {
count++;
document.getElementById("err_radio441").innerHTML="";
}
if (count==3)
{
return true;
} else {
return false;
}
} // End Validation Function