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isbn-13

ISBN 13

Algunos documentos para entender la nueva situación

Herramientas

Pego aquí el código JS por las dudas: 

// **************************************************************
// Validation/conversion functions for ISBN numbers
 
var bAlert;
 
function convertISBN(form)
{
	// Set default variables and cleanup ISBN
	var form = document.isbncnvt;
	form.isbn_in.value = form.isbn_in.value.replace(/[-\s]/g,"").toUpperCase();
	var isbnnum = form.isbn_in.value;
	var isbn10exp = /^\d{9}[0-9X]$/;
	var isbn13exp = /^\d{13}$/;
	var isbnlen = isbnnum.length;
	var total = 0;
 
	// Preliminary validation
	if (isbnlen == 0) {
		alert("Please enter an ISBN to convert in the first box.");
        form.isbn_in.focus();
      	form.isbn_in.select();
       	return false;
   	}
 
	if ((form.isbn_out.value != "") && (isbnlen == 0)) {
		alert("Please enter the ISBN to convert in the first box.");
        form.isbn_in.focus();
        form.isbn_in.select();
        return false;
   	}
 
   	if (!(isbn10exp.test(isbnnum)) && !(isbn13exp.test(isbnnum))) {
		if ((isbnlen != 10) && (isbnlen != 13)) {
 			alert("This ISBN is invalid." + "\n" +
		   	      "It contains " + isbnlen + " characters.");
		}
		else {
 			alert("This ISBN is invalid." + "\n" +
		   	      "It contains invalid characters.");			
		}
          	form.isbn_in.focus();
          	form.isbn_in.select();
          	return false;
    	}
 
	// Validate & convert a 10-digit ISBN
	if (isbnlen == 10) {
		// Test for 10-digit ISBNs:
		// Formulated number must be divisible by 11
		// 0234567899 is a valid number
		for (var x=0; x<9; x++) { 
			total = total+(isbnnum.charAt(x)*(10-x)); 
		}
 
		// check digit
		z = isbnnum.charAt(9);
		if (z == "X") { z = 10; }
 
		// validate ISBN
		if ((total+z*1) % 11 != 0) {   // modulo function gives remainder
			z = (11 - (total % 11)) % 11;
			if (z == 10) { z = "X"; }
			alert("This 10-digit ISBN is invalid." + "\n" +
			      "The check digit should be " + z + ".");
			form.isbn_in.focus();
			form.isbn_in.select();
			return false;
		}
		else {
			// convert the 10-digit ISBN to a 13-digit ISBN
			isbnnum = "978"+isbnnum.substring(0,9);
			total = 0;
			for (var x=0; x<12; x++) {
				if ((x % 2) == 0) { y = 1; }
				else { y = 3; }
				total = total+(isbnnum.charAt(x)*y);
			}		
			z = (10 - (total % 10)) % 10;
		}		
	}
 
	// Validate & convert a 13-digit ISBN
	else { 
		// Test for 13-digit ISBNs
		// 9780234567890 is a valid number
		for (var x=0; x<12; x++) {
			if ((x % 2) == 0) { y = 1; }
			else { y = 3; }
			total = total+(isbnnum.charAt(x)*y);
		}
 
		// check digit
		z = isbnnum.charAt(12);
 
		// validate ISBN		
		if ((10 - (total % 10)) % 10 != z) {   // modulo function gives remainder
			z = (10 - (total % 10)) % 10; 
			alert("This 13-digit ISBN is invalid." + "\n" +
			      "The check digit should be " + z + ".");
			form.isbn_in.focus();
			form.isbn_in.select();
			return false;
		}
		else {
			// convert the 13-digit ISBN to a 10-digit ISBN
			if ((isbnnum.substring(0,3) != "978")) {
				alert("This 13-digit ISBN does not begin with \"978\"" + "\n" +
				      "It cannot be converted to a 10-digit ISBN.");
				form.isbn_in.focus();
				form.isbn_in.select();
				return false;
			}
			else {
				isbnnum = isbnnum.substring(3,12);
				total = 0;
				for (var x=0; x<9; x++) {
					total = total+(isbnnum.charAt(x)*(10-x));
				}
				z = (11 - (total % 11)) % 11;
				if (z == 10) { z = "X"; } 
			}
		}
	}
	if (form.hyphenate.checked == true) {
		bAlert = true;
		form.isbn_in.value = hyphenate(form.isbn_in.value);
		bAlert = false;
		form.isbn_out.value = hyphenate(isbnnum+z);
	}
	else { 	form.isbn_out.value = isbnnum+z; } 
	return true;
 
}//convertISBN(form)
 
function hyphenate(isbn)
{
 
var prefix;
 
if (isbn.length == 13)	// for 13-digit ISBNs
{
	prefix = isbn.substring(0,3) + "-";
	isbn = isbn.substring(3,13);
}
else { prefix = ''; }
 
var d = eval(isbn.substring(0,1));	// one digit
var d2 = eval(isbn.substring(1,3));	// two digits
var d4 = eval(isbn.substring(1,5));	// four digits
var objRegExp = "";
 
switch(d) {
	case 0:
    case 3:
    case 4:
/*
0 = English-speaking areas
3 = German-speaking areas
4 = Japan
*/
	switch(true) {
		case (d2 < 20):
			objRegExp = /(\d)(\d{2})(\d{6})(\w)/;
	        break;
        case (d2 < 70):
			objRegExp = /(\d)(\d{3})(\d{5})(\w)/;
		  	break;
        case (d2 < 85):
			objRegExp = /(\d)(\d{4})(\d{4})(\w)/;
		  	break;
        case (d2 < 90):
			objRegExp = /(\d)(\d{5})(\d{3})(\w)/;
		  	break;
        case (d2 < 95):
			objRegExp = /(\d)(\d{6})(\d{2})(\w)/;
		  	break;
        case (d2 <= 99):
			objRegExp = /(\d)(\d{7})(\d)(\w)/;
			break;
        default:
	        break;
	}
	break;
 
	case 1:
/*
1 = English-speaking areas
*/
	switch(true) {
		case (d4 < 1000):
			objRegExp = /(\d)(\d{2})(\d{6})(\w)/;
	        break;
        case (d4 < 4000):
			objRegExp = /(\d)(\d{3})(\d{5})(\w)/;
			break;
        case (d4 < 5500):
			objRegExp = /(\d)(\d{4})(\d{4})(\w)/;
		  	break;
        case (d4 < 8698):
			objRegExp = /(\d)(\d{5})(\d{3})(\w)/;
		  	break;
        case (d4 < 9990):
			objRegExp = /(\d)(\d{6})(\d{2})(\w)/;
		 	break;
        case (d4 <= 9999):
			objRegExp = /(\d)(\d{7})(\d)(\w)/;
		  	break;
        default:
	        break;
	}
	break;
 
    case 2:
/*
2 = French-speaking areas
*/
	switch(true) {
		case (d2 < 20):
			objRegExp = /(\d)(\d{2})(\d{6})(\w)/;
	        break;
        case (d2 < 70):
			objRegExp = /(\d)(\d{3})(\d{5})(\w)/;
		  	break;
        case (d2 < 84):
			objRegExp = /(\d)(\d{4})(\d{4})(\w)/;
			break;
        case (d2 < 90):
			objRegExp = /(\d)(\d{5})(\d{3})(\w)/;
			break;
        case (d2 < 95):
			objRegExp = /(\d)(\d{6})(\d{2})(\w)/;
		  	break;
        case (d2 <= 99):
			objRegExp = /(\d)(\d{7})(\d)(\w)/;
			break;
        default:
	        break;
	}
	break;
 
    case 9:
/*
90 = Dutch/Flemish-speaking
*/ 
  if (isbn.substring(1,2) == 0) {
	d2 = isbn.substring(2,4);
	switch(true) {
		case (d2 < 20):
			objRegExp = /(\d{2})(\d{2})(\d{5})(\w)/;
	        break;
        case (d2 < 50):
			objRegExp = /(\d{2})(\d{3})(\d{4})(\w)/;
		  	break;
        case (d2 < 70):
			objRegExp = /(\d{2})(\d{4})(\d{3})(\w)/;
		  	break;
        case (d2 < 80):
			objRegExp = /(\d{2})(\d{5})(\d{2})(\w)/;
		  	break;
        case (d2 <= 81):
			objRegExp = /(\d{2})(\d{6})(\d)(\w)/;
			break;
        default:
	    	break;
	}
  }
 
/*
965 = Israel
*/
  if (isbn.substring(1,3) == 65) { 
	d2 = isbn.substring(3,5);
	switch(true) {
		case (d2 < 20):
			objRegExp = /(\d{3})(\d{2})(\d{4})(\w)/;
	        break;
        case (d2 < 70):
			objRegExp = /(\d{3})(\d{3})(\d{3})(\w)/;
		  	break;
        case (d2 < 90):
			objRegExp = /(\d{3})(\d{4})(\d{2})(\w)/;
		  	break;
        case (d2 <= 95):
			objRegExp = /(\d{3})(\d{5})(\d)(\w)/;
		  	break;
        default:
	        break;
	}
  }  
 
/*
981 = Singapore
*/ 
  if (isbn.substring(1,3) == 81) {
	d2 = isbn.substring(3,5);
	switch(true) {
		case (d2 < 20):
			objRegExp = /(\d{3})(\d{2})(\d{4})(\w)/;
	        break;
        case (d2 < 30):
			objRegExp = /(\d{3})(\d{3})(\d{3})(\w)/;
		  	break;
        case (d2 <= 40):
			objRegExp = /(\d{3})(\d{4})(\d{2})(\w)/;
		  	break;
        default:
	        break;
	}
  }  
  else { break; }
 
        break;
 
	default:
   		break;
}
 
if (objRegExp != "") {
       isbn = prefix + isbn.replace(objRegExp, "$1-$2-$3-$4");
}
else { 
	if (bAlert == true) { alert("Unable to hyphenate this ISBN!"); }
	isbn = (prefix + isbn).replace(/[-]/g,"");
}
return isbn;
}//hyphenate(isbn)
isbn-13.txt · Last modified: 29/11/2010 00:00 (external edit)

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