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 if (!InputValidator(txt.Text.Trim()))
            {
                ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "myScript", "alert('\"Îı¾¿ò\"ÊäÈëÁË·Ç·¨×Ö·û»òÊäÈ볬³¤£¡');", true);
                return;
            }
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protected bool InputValidator(string inputStr)
{
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   {
       return true;
   }
   return false;
}
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  var regExp=new RegExp("^[\u4e00-\u9fa50-9a-zA-Z_£¬¡££¿£º£»‘’£¡“”—……¡¢(£­{2}) (£¨£©) (¡¾¡¿) ({}) (¡¶¡·)-,.?:;\"!`(\\-{2})(\\.{3})(\\(\\))(\\[\\])({})]{0,50}$");
         if(!regExp.test(txt1.value))
         {
          alert('ÊäÈëÁË·Ç·¨×Ö·û»òÊäÈ볬³¤£¡');
          txt1.focus();
          return;
         }


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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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