var IstexWidget = function() {};

IstexWidget.prototype = {
    injectHTML: function() {

        var searchWidget = document.getElementById("istex-widget-search");
        var request = new XMLHttpRequest();
        request.open("GET", "http://caron.ads.intra.inist.fr/istex-api-widget/html/part_search.html");
        request.onload = function() {
        	console.log("C'est bon? ")
            searchWidget.innerHTML = request.responseText;
        };
        request.send();
    }
};

var istexWidget = new IstexWidget();
istexWidget.injectHTML();