avimar

/*License: MIT*/
function isracardCheck(num) {//algorithm explanation: https://web.archive.org/web/20140227235803/http://povolotski.me/2013/09/24/isracard-credit-card-number-validation-2/
	if(typeof num !== 'number') num=''+num;
	if(num.length < 8 || num.length > 9) return false;
	var sum=0;
	num.split('').forEach(function(val,key){
		sum+=parseInt(val,10)*(num.length-key);
		})
	return sum % 11 == 0;
	}