<script language="javascript">
<!--
function blockA(e)
{
if (document.layers)
{
var keyChar =e.which;
}
if (document.all)
{
var keyChar =event.keyCode;
}
if (keyChar=="13")
{
alert("不要使用回车")
return false
}
}
document.form1.textfield.onkeypress=blockA
//-->
</script>
<!--
function blockA(e)
{
if (document.layers)
{
var keyChar =e.which;
}
if (document.all)
{
var keyChar =event.keyCode;
}
if (keyChar=="13")
{
alert("不要使用回车")
return false
}
}
document.form1.textfield.onkeypress=blockA
//-->
</script>
<input type="text" name="textfield">
加一个隐藏input
<input type="hidden" name="test">
</form>
<input type="text" onkeydown="return (event.keyCode!=13)">
</form>
<input type="text" onkeydown="if(event.keyCode==13)return false;">
</form>