摘要： <script>var xmlHTTP=null;var lastusername='';function checkreturn(){return (event.keyCode==13)?1:0;}function reg_check(){if(document.getElementById('name').value.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) == -1) { alert('用户名格式输入错误!' 阅读全文