Subversion Repositories Applications.papyrus

if(!dojo._hasResource["dojox.validate.isbn"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.validate.isbn"] = true;
dojo.provide("dojox.validate.isbn");

dojox.validate.isValidIsbn = function(/* String */value) {
        // summary: Vadlidate ISBN-10 or ISBN-13 based on the length of value
        // returns: Boolean
        var len, sum, weight;
        if(typeof value!='string'){
                value = String(value);
        }
        value = value.replace(/[- ]/g,''); //ignore dashes and whitespaces
        len = value.length;
        sum = 0;
        if(len == 10){
                weight = 10;
                // ISBN-10 validation algorithm
                for(var i = 0; i< 9; i++){
                        sum += parseInt(value.charAt(i)) * weight;
                        weight --;
                }
                var t = value.charAt(9).toUpperCase();
                sum += t == 'X' ? 10 : parseInt(t);
                return sum % 11 == 0;
        }else if(len == 13) {
                weight = -1;
                for(var i=0; i< len; i++){
                        sum += parseInt(value.charAt(i)) * (2 + weight);
                        weight *= -1;
                }
                return sum % 10 == 0;
        }else{
                return false;
        }
}

}