js验证中能输入中文英文
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><TITLE> New Document </TITLE><META NAME="Generator" CONTENT="EditPlus"><META NAME="Author" CONTENT=""><META NAME="Keywords" CONTENT=""><META NAME="Description" CONTENT=""><script>function check(str){reg = /^([\u4E00-\u9FA5]|[A-Za-z0-9])*$/;if(reg.test(str)){alert("ok");}else{alert("请输入用户名只能是中文英文和数字");}}</script></HEAD><BODY><input type="text" name="aaa"><input type="button" value="test" onclick="check(document.getElementById('aaa').value)"></BODY></HTML>?