$(document).ready(function() {
	$('#anterior').click(function() {
		if($(this).attr("value") != '')
		{
			document.frm.p.value = $(this).attr("value");
			document.frm.submit();
		}
		else
			return false;
	});
	$('#p').keydown(function(event){
		if((event.keyCode >= 48 && event.keyCode <= 57) || (event.keyCode >= 96 && event.keyCode <= 105) || event.keyCode == 8 || event.keyCode == 46 || event.keyCode == 39 || event.keyCode == 37)
			return true;
		else if(event.keyCode == 13)
		{
			if(Math.abs(this.value) > Math.abs($(this).attr("rel")))
				this.value = Math.abs($(this).attr("rel"));
			if(Math.abs(this.value) < 1)
				this.value = 1;
			document.frm.submit();
		}
		else
			return false;
	});
	$('#proxima').click(function() {
		if($(this).attr("value") != '')
		{
			document.frm.p.value = $(this).attr("value");
			document.frm.submit();
		}
		else
			return false;
	});
});