function getInputYear(inputYear, defaultYear)
{  
    
	var dy = parseInt(defaultYear);
	
	if (!isNaN(inputYear))
    {
        var iy = parseInt(inputYear);		
		if(iy >= 1970 && iy<=2037)
		{
			return iy;
		}
		else
		{
			return dy;	
		}
		
    }
    else
    {
        return dy;
    } 
}