function mascaraeverest ( nameMascara ) {
    $('input[name^=\''+nameMascara+'\']').keypress( function(e) {
		var key = e.charCode ? e.charCode : (e.keyCode ? e.keyCode : 0);
		if ( key == 32 ) {
			var today = new Date();
			var day = today.getDate().toString();
			var month = (today.getMonth()+1).toString();
			var year = today.getFullYear().toString();
			if ( today.getDate() < 10 )
			day = '0'+day;
			if ( (today.getMonth()+1) < 10 )
			month = '0'+month;
			
			var dig = $(this).val();
			var digday = dig.substring(0,2);
			var digmonth = dig.substring(3,5);
			var digyear = dig.substring(6,10);
		
			if ( digday == "__" ) {
				digday = day;
			}
			else if ( digday.substring(1,2) == "_" && digday.substring(0,1) != "0" && digday.substring(0,1) != "_" ) {
				digday = '0'+digday.substring(0,1);
			}
			else if ( digday.substring(0,1) == "0" && digday.substring(1,2) == "_" ) {
				digday = digday.substring(0,1)+'1';
			}
			else
				digday = digday;
				
			if ( digmonth == "__" ) {
				digmonth = month;
			}
			else if ( digmonth.substring(1,2) == "_" && digmonth.substring(0,1) != "0" && digmonth.substring(0,1) != "_" ) {
				digmonth = '0'+digmonth.substring(0,1);
			}
			else if ( digmonth.substring(0,1) == "0" && digmonth.substring(1,2) == "_" ) {
				digmonth = digmonth.substring(0,1)+'1';
			}
			else
				digmonth = digmonth;
				
			if ( digyear.substring(0,1) == '_' || digyear.substring(1,2) == '_' || digyear.substring(2,3) == '_' || digyear.substring(3,4) == '_' )
				digyear = year;
			
			$(this).val(digday+'/'+digmonth+'/'+digyear);
		}
		}).mask('99/99/9999');
}