How to use javascript to set text area value in a form in IE

问题

I can use this to set a text area (selectedtext) value in a form (submitquestion) if Firefox, but it fails in IE.

document.submitquestion.selectedtext.value = txt;

回答1:

This should work:

<textarea id="bla">from</textarea>
<script type="text/javascript">
document.getElementById("bla").value = "test";
</script>

回答2:

Try this:

document.forms['submitquestion'].elements['selectedtext'].value = txt;

Assuming you have:

<form name='submitquestion'>
    <textarea name='selectedtext'></textarea>
</form>

回答3:

I recommend using JQuery, it works with all browsers.

$('#selectedtext').val('whatever');

回答4:

You can do this in pure javascript like this

document.getElementById("myTextarea").value = txt;

来源：https://stackoverflow.com/questions/5589057/how-to-use-javascript-to-set-text-area-value-in-a-form-in-ie