check_card_script.js

function checkBankBin(cardNumber){
	var bankBinsSupport = ['970432','970416','9704163','970424','970418','970448','970426','970441','970403','970436','686868','970437','970429','550796','453618','970415','970443','970422','970454','970424'];

	var result = new Object();
	result['support'] = false;
	result['cardNumberFormat'] = '#### #### #### ####'
	result['cardNumberLength'] = result['cardNumberFormat'].replace(/ /g,'').length;

	if(cardNumber) {
		cardNumber = cardNumber.replace(/ /g,'');
		var l = Math.min(8, cardNumber.length);
		for(var i = l; i > 3; i--) {
			if(bankBinsSupport.indexOf(cardNumber.substring(0, i)) != -1) {
				result.support = true;
				break;
			}
		}
		if(cardNumber.substring(0, 6) == '970436') {
			result['cardNumberFormat'] = '######## ######## ###'
		}
		result['cardNumberLength'] = result['cardNumberFormat'].replace(/ /g,'').length;
	}
	return result;
}