<form name=form1>
<input type=text name=text1 onchange=document.form1.test.disabled=false>
<input type="submit" name="test" value="submit" disabled="true">
</form>
<input type=text name=text1 onchange=document.form1.test.disabled=false>
<input type="submit" name="test" value="submit" disabled="true">
</form>
->
document.all("test").disabled=false是布尔值,不是字符串啊.
<html><form name=form1 action="test1.html">
<input type=text name=text1 onclick=document.form1.test.disabled=false>
<input type="submit" name="test" value="submit" disabled="true">
</form></html>
document.all("test").disabled=false