function number_format(number,laenge,sep,th_sep ) {
	number = Math.round( number * Math.pow(10, laenge) ) / Math.pow(10, laenge);
	str_number = number+"";
	arr_int = str_number.split(".");
	if(!arr_int[0]) arr_int[0] = "0";
	if(!arr_int[1]) arr_int[1] = "";
	if(arr_int[1].length < laenge){
		nachkomma = arr_int[1];
		for(i=arr_int[1].length+1; i <= laenge; i++){  nachkomma += "0";  }
		arr_int[1] = nachkomma;
	}
	if(th_sep != "" && arr_int[0].length > 3){
		Begriff = arr_int[0];
		arr_int[0] = "";
		for(j = 3; j < Begriff.length ; j+=3){
			Extrakt = Begriff.slice(Begriff.length - j, Begriff.length - j + 3);
			arr_int[0] = th_sep + Extrakt +  arr_int[0] + "";
		}
		str_first = Begriff.substr(0, (Begriff.length % 3 == 0)?3:(Begriff.length % 3));
		arr_int[0] = str_first + arr_int[0];
	}
	return arr_int[0]+sep+arr_int[1];
}