Method for determining whether the form is empty

Html page
Copy codeThe Code is as follows:
<Form onsubmit = "if (confirm ('Make sure you have entered the correct information; otherwise, an error will be reported! ') {Return checkForm ();} else {return false;} ">
<Table>
<Tr>
<Td> select the sender <font class = "red"> * </font> </td>
<Td>
<Input type = "text" name = "sendto_type []" id = "sendto_type1" value = "1"> send by city

</Td>
</Tr>

<Tr>
<Td> select sender 2 <font class = "red"> * </font> </td>
<Td>
<Input type = "text" name = "sendto_type []" id = "sendto_type1" value = "1"> send by city
</Td>
</Tr>
</Table>
</Form>

Js Code
Copy codeThe Code is as follows:
<Script>
Function checkForm (){
Pass = true;
$ ("Td: contains ('*')"). next (). find ("input"). each (function (){
If (this. value = ''){
Text = $ (this). parent (). prev (). text ();
Alert (text + "is required ");
This. focus ();
Pass = false;
Return false; // jump out of each
}
});
Return pass;
}
</Script>