change value of text using getElementsByName

问题

I have firstName text that I want to change his value but it not work -

<input type="text" name="firstName" />
<script LANGUAGE="JavaScript" TYPE="text/javascript">
      document.getElementsByName("firstName").[0].value = "New Value " ;
</script>

How can I change this value ?

回答1:

That's not syntactically valid JS. Remove the extra .:

//                                    ↓↓
document.getElementsByName("firstName")[0].value = "New Value " ;
//                                    ↑↑

and the rest will work.

来源：https://stackoverflow.com/questions/11851682/change-value-of-text-using-getelementsbyname