回车模拟表单提交
document.onkeydown = function(evt){
var evt = window.event?window.event:evt;
if(evt.keyCode==13)
{
document.forms["myForm"].submit();
}
}
var evt = window.event?window.event:evt;
if(evt.keyCode==13)
{
document.forms["myForm"].submit();
}
}