var field_label   = Array("user_name","user_email");
 var field_msg = Array("User Name","Email");

  function CheckForm( form )
  {
 
        for(var index in field_label)
        {
          curr_field_name = field_label[index];
          curr_field = form[curr_field_name];

          var not_check = 1;
          
          if(curr_field.type=="text")
          {
            not_check = 0;
            var str_val = curr_field.value;
            if(str_val.length == 0)
            {
              alert('Please enter '+field_msg[index]);
              curr_field.focus();
              return false;
            }
	  else
	  {
		if( curr_field_name.search(/email/i) >= 0 )
		{
			var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
			if ( !filter.test(curr_field.value) ) 
			{
			      alert('Please enter valid email address');
			      curr_field.focus();
			      return false;          		
			}

		}
	  }            
          }

          
          if( curr_field.type == "select-one" )
            if( !curr_field.selectedIndex )
            {
              alert('Please select one of the options for '+field_msg[index]);
              return false;
            }
            

        }

 
    return true;

  }