function isLeapYear(year) {
	year = parseInt(year);

	if(year%4 == 0)
	{
		if(year%100 != 0)
		{
			return true;
		}
		else
		{
			if(year%400 == 0)
				return true;
			else
				return false;
		}
	}
    return false;
}

function isPhoneValid(value)
{
	var i=0;
	var s = new String();
	var c='';
	s = value.toString();
	if (s.length > 10)
	{
	    return false;
	}
	for(i=0;i<s.length;i++)
	{
		c = s.substring(i,i+1);
		if(!isValidPhoneChar(c))
		{
			return false;
		}
	}
	return true;
}
function isValidPhoneChar(c)
{
	if((c == "0")||(c == "1")||(c == "2")||(c == "3")||(c == "4")) return true;
	if((c == "5")||(c == "6")||(c == "7")||(c == "8")||(c == "9")) return true;
	return false;
}