function checkEmail(str) {
  var pass = 0;
  if (window.RegExp) {
    var tempStr = "a";
    var tempReg = new RegExp(tempStr);
    if (tempReg.test(tempStr)) pass = 1;
  }
  if (!pass) 
    return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
  var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
  var r2 = new RegExp("^[a-zA-Z0-9\\.\\!\\#\\$\\%\\&\\'\\*\\+\\-\\/\\=\\?\\^\\_\\`\\{\\}\\~]*[a-zA-Z0-9\\!\\#\\$\\%\\&\\'\\*\\+\\-\\/\\=\\?\\^\\_\\`\\{\\}\\~]\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3})(\\]?)$");
  return (!r1.test(str) && r2.test(str));
}
function ENinside(sValue)
{  
  var checkOK = "abcdefghijklmnopqrstuvwxyz";
  var checkStr = sValue;
  var allValid = false;
  for(i = 0;  i < checkStr.length;  i++) {
    ch = checkStr.charAt(i);
    for(j = 0;  j < checkOK.length;  j++) {
      if(ch == checkOK.charAt(j)) {   //包含英文		  
 	    allValid = true;
	    break;
	  }
	  else {
	    allValid = false;
	  }
	}
	if (allValid)	
	  break;
  }
  if(allValid)  //有找到
	return (false);
  else
	return (true);	  
}