js实现iframe框架的面包屑功能

var breadcrumb = [{name: 'Home', url: '/'}, {name: 'Products', url: '/products'}, {name: 'Shoes', url: '/products/shoes'}, {name: 'Running Shoes', url: '/products/shoes/running'}];
var breadcrumbString = '';
for (var i = 0; i < breadcrumb.length; i++) {
    breadcrumbString += '<a href="' + breadcrumb[i].url + '">' + breadcrumb[i].name + '</a>';
    if (i < breadcrumb.length - 1) {
        breadcrumbString += ' > ';
    }
}
document.getElementById('breadcrumb').innerHTML = breadcrumbString;

var iframe = document.getElementById('myiframe');
var breadcrumb = iframe.contentWindow.breadcrumb;
var breadcrumbString = '';
for (var i = 0; i < breadcrumb.length; i++) {
    breadcrumbString += '<a href="' + breadcrumb[i].url + '">' + breadcrumb[i].name + '</a>';
    if (i < breadcrumb.length - 1) {
        breadcrumbString += ' > ';
    }
}
document.getElementById('breadcrumb').innerHTML = breadcrumbString;