function checknumber(sayi)
	{
	temp=sayi.value;
	var test = "";
	for (var k = 0; k < temp.length; k++)
		{
		var c = temp.substring(k, k+1);
		if(c!=".")test+=c;
		}
	temp=test;
	sayi.value=dotview(removedots(sayi.value));
	if(!isAllDigits(temp))
		{
		temp="0";sayi.value=temp;
		return false;
		}
	else
		{return true;}
	}

function isDigit(c)
	{
	var test = "" + c;
	if (test == "0" || test == "1" || test == "2" || test == "3" || test == "4" || test == "5" || test == "6" || test == "7" || test == "8" || test == "9")
		{return true;}
	return false;
}

function isAllDigits(s)
	{
	var test = "" + s;
	for (var k = 0; k < test.length; k++)
		{
		var c = test.substring(k, k+1);
		if (isDigit(c) == false)
			{return false;}
		}
	return true;
	}

function removedots(str)
	{
	var test = "";
	for (var k = 0; k < str.length; k++)
		{
		var c = str.substring(k, k+1);
		if(c!=".")test+=c;
		}
	return test;
	}


function dotview(sayi)
	{
	var re = /(-?\d+)(\d{3})/
	var num = sayi;
	while (re.test(num))
		{num = num.replace(re,"$1.$2")}
	return num;
	}