Uses XDR in IE and $.ajax in any other browser. Make sure to include JQuery & Modernizr for browser detection.

IEvsOthersAjax.js

$(document).ready(function() {
  	var BrowserDetect = 
		{
		    init: function () 
		    {
		        this.browser = this.searchString(this.dataBrowser) || "Other";
		        this.version = this.searchVersion(navigator.userAgent) ||       this.searchVersion(navigator.appVersion) || "Unknown";
		    },
		 
		    searchString: function (data) 
		    {
		        for (var i=0 ; i < data.length ; i++)   
		        {
		            var dataString = data[i].string;
		            this.versionSearchString = data[i].subString;
		 
		            if (dataString.indexOf(data[i].subString) != -1)
		            {
		                return data[i].identity;
		            }
		        }
		    },
		 
		    searchVersion: function (dataString) 
		    {
		        var index = dataString.indexOf(this.versionSearchString);
		        if (index == -1) return;
		        return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
		    },
		 
		    dataBrowser: 
		    [
		        { string: navigator.userAgent, subString: "Chrome",  identity: "Chrome" },
		        { string: navigator.userAgent, subString: "MSIE",    identity: "Explorer" },
		        { string: navigator.userAgent, subString: "Firefox", identity: "Firefox" },
		        { string: navigator.userAgent, subString: "Safari",  identity: "Safari" },
		        { string: navigator.userAgent, subString: "Opera",   identity: "Opera" }
		    ]
		 
		};
		BrowserDetect.init();
		var url = "https://secure.havenforhope.org/api/blog/?apikey=PqJmvTiwZmCBRmcLHYKbqkkmd";
		console.log(BrowserDetect.browser + " " + BrowserDetect.version);
		if (BrowserDetect.browser == 'Explorer'){
		    // Use Microsoft XDR
		    var req = new XMLHttpRequest();
			req.open('GET', url,false);
			req.send(null);
			var headers = req.getAllResponseHeaders().toLowerCase();
			alert(headers);
			alert(JSON.stringify(req.responseText));
		}else{
		    $.ajax({
		        type: "GET",
		        url: url,
		        dataType: "json",
		        success: function(response) {
		            console.log("Response: "+ JSON.stringify(response));
		        },
		        error: function (msg) {
		        	console.log(JSON.stringify(msg));
		        }
		    });
		}
	});