Check for a valid image in HREF.

ValidImg.js

function IsValidImageUrl(url, callback) {

  jQuery("<img>", {
	
		src: url,
		error: function() {  callback(false); },
		load: function() {  callback(true); }
	
	});

}	

// usage
IsValidImageUrl(url, function(result) { 

	//action

});