// CAB JavaScript Document

function isNumberOrBackspace(e)
{
	var retVal = false;
	var key;

	if(window.event)
	{
		key = window.event.keyCode;
	}
	else if(e)
	{
		key = e.which;
	}
	
	if((key == null) || (key == 0) || (key == 8) || (key == 9) || (key == 13) || (key == 27) || (key == 46))
	{
		// control keys
		retVal = true;
	}
	else if((key >= 48 && key <= 57) || (key >= 96 && key <= 105))
	{
		// numbers
		retVal = true;
	}
	
	return retVal;
}