function checkemail( data, allowednull)
{
  var datastr = data;
  var lefttrim = datastr.search(/\S/gi);
  
  if (lefttrim == -1) {
    if (allowednull) {
      return 1;
    } else {
      alert("您输入的用户名（E-mail地址）不合法，请重新输入");
      return -1;
    }
  }
  var myRegExp = /[a-z0-9](([a-z0-9]|[_\-\.][a-z0-9])*)@([a-z0-9]([a-z0-9]|[_\-][a-z0-9])*)((\.[a-z0-9]([a-z0-9]|[_\-][a-z0-9])*)*)/gi;
  var answerind = datastr.search(myRegExp);
  var answerarr = datastr.match(myRegExp);
  
  if (answerind == 0 && answerarr[0].length == datastr.length)
  {
    return 0;
  }
  
  alert("请输入一个正确的用户名（E-mail地址）！");
  return -1;
}

function check(theForm) { 
 if (theForm.login_name.value == "") 
  {alert("请您填写用户名（电子邮件)再提交！");
  theForm.login_name.focus();
  return (false); }
 else{
	  if (checkemail(theForm.login_name.value,false)<0) { 
	      theForm.login_name.focus();
	      return (false); }
	  else{ 
	      if (theForm.login_password.value == "") {
			  alert("请您填写密码后提交！");
			  theForm.login_password.focus();
			  return (false); }
		  else{
		      if(theForm.bmp_code.value == "") {
			  alert("请您填写验证码后提交！");
			  theForm.bmp_code.focus();
			  return (false); }
		       else{return (true);}
			   }
	  }	  
 } 
} 

document.write ('<div id="userDiv"><div id="user_log">');
document.write ('  <div id="user_log_form"> ');
document.write ('	  <form action="user/checkuser.asp" method="post" onsubmit="return check(this)">');
document.write ('	  <table border="0" cellpadding="0" cellspacing="0" width="320">');
document.write ('		  <tr valign="middle">');
document.write ('			<td height="22">用户名：<input type="text" name="login_name" style="width:121px !important;width:120px;" class="inputBox_top_user" maxlength="200" tabindex="1" /></td>');
document.write ('			<td height="22">密码：<input type="password" name="login_password" style="width:92px !important;width:90px;"  class="inputBox_top_pass" maxlength="20" tabindex="2" /></td>');
document.write ('		  </tr><tr valign="middle">');
document.write ('            <td height="22">验证码：<input type="text" name="bmp_code" style="width:65px !important;width:62px;" class="inputBox_top_code" maxlength="4" tabindex="3"/> <img src="comm/bmp_code.asp" alt="验证码,看不清楚?请点击验证码或刷新本页" class="bmp_code_img" align="absmiddle" onclick="this.src=\'comm/bmp_code.asp\'" /></td>');
document.write ('			<td height="22">&nbsp;<input name="imageField" type="image" src="images/b_login.gif" tabindex="4" align="absmiddle" alt="登录按钮" tabindex="5" /> <a href="user/user_reg.asp" target="_self"><img src="images/b_reg.gif" align="absmiddle" alt="注册按钮" /></a></td>');
document.write ('         </tr> </table></form>');
document.write (' </div> ');
document.write (' <div id="user_log_flash"><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="498" height="65"><param name="movie" value="swf/cn-doc_flash.swf"><param name="quality" value="high"> <embed src="swf/cn-doc_flash.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="498" height="65"></embed></object></div> ');
document.write ('</div></div>');