code: function _fnStringToCss( s )
  		{
  			if ( s === null )
  			{
  				return "0px";
  			}
  			
  			if ( typeof s == 'number' )
  			{
  				if ( s < 0 )
  				{
  					return "0px";
  				}
  				return s+"px";
  			}
  			
  			/* Check if the last character is not 0-9 */
  			var c = s.charCodeAt( s.length-1 );
  			if (c < 0x30 || c > 0x39)
  			{
  				return s;
  			}
  			return s+"px";
  		}
docs: Append a CSS unit (only if required) to a string
  @param {array} aArray1 first array
  @param {array} aArray2 second array
  @returns {int} 0 if match, 1 if length is different, 2 if no match
  @memberof DataTable#oApi