function addEvent(elem, evnt,  func) {
    if (elem.addEventListener) {
         elem.addEventListener(evnt, func, false);
    } else if (elem.attachEvent) { // IE
        elem.attachEvent("on"+evnt, func);
    } else {
        elem["on"+evnt] = func;
    }
}

var SWidget = {
    'container': null,
    'iframe': null,
    'color': '#000000',
    'init': function () {
        this.container = document.getElementById('safety-widget');
        this.container.innerHTML = '<iframe id="widget_iframe" src="https://safety-rest.ru/widget/index.php?color=000000&partnerId=" scrolling="no" width="315px" height="440px" frameborder="0"></iframe>';
    
        this.iframe = document.getElementById('widget_iframe');
    },
    'height': function (heights) {
        this.iframe.style.height = heights + "px";
    },
}

addEvent (window, "message", function ( event ) {
    height = parseInt(event.data);
    SWidget.height(height);
});

window.addEventListener('load', function () {
    SWidget.init();
}, false);