function CheckIfEnglish( String )
{ 
    var Letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890-";
     var i;
     var c;
      if(String.charAt( 0 )=='-')
 return false;
      if( String.charAt( String.length - 1 ) == '-' )
          return false;
     for( i = 0; i < String.length; i ++ )
     {
          c = String.charAt( i );
   if (Letters.indexOf( c ) < 0)
      return false;
     }
     return true;
}


function submitchecken3() {

 if (document.checkdomain.domain.value == "") {
  alert("请输入您要查询的英文域名。");
  document.checkdomain.domain.focus();
  return false;
 }

if (!CheckIfEnglish(document.checkdomain.domain.value )) {
  alert("在查询英文域名应输入英文不能输入中文及非法字符！");
  document.checkdomain.domain.focus();
  return false;
 }
 return true;
}

function submitchecken4() {

 if (document.login.name.value == "") {
  alert("请输入邮箱用户名。");
  document.login.name.focus();
  return false;
 }

 if (document.login.passwd.value == "") {
  alert("请输入邮箱密码。");
  document.login.passwd.focus();
  return false;
 }
 return true;
}


function lbsong()
{
window.open("about:blank","domainzs","scrollbars=no,resizable=no,width=500,height=300,menubar=no,top=100,left=168");
}