将回车切换成tag键

普通js

<script>
document.body.onkeydown = function()
{
if(event.keyCode == 13)
{
   event.keyCode = '9'
}
}
</script>

jQuery更简单

$(document).ready(function(){
$(document).keydown(function(){if(event.keyCode==13){event.keyCode='9';}})
});