function popup(url, name, width, height) {
    var winl = (screen.width - width) / 2;
    var wint = (screen.height - height) / 2;
    settings = 'height=' + height + ',width=' + width + ',top=' + wint + ',left=' + winl + ',scrollbars=no,toolbar=no';

    newwindow = window.open(url, name, settings);
    if (window.focus) { newwindow.focus() }
    return false;
}

this.screenshotPreview = function () {
    xOffset = -20;
    yOffset = -720;

    $("img.screenshot").hover(function (e) {
        this.t = this.title;
        this.title = "";
        var c = (this.t != "") ? "<br/>" + this.t : "";
        $("body").append("<p id='screenshot'><img src='" + this.alt + "' alt='resim önizleme' /></p>");
        $("#screenshot")
			.css("top", (e.pageY - xOffset) + "px")
			.css("left", (e.pageX + yOffset) + "px")
			.fadeIn("fast");
    },
	function () {
	    this.title = this.t;
	    $("#screenshot").remove();
	});
    $("img.screenshot").mousemove(function (e) {
        $("#screenshot")
			.css("top", (e.pageY - xOffset) + "px")
			.css("left", (e.pageX + yOffset) + "px");
    });
};