See using dispatchEvent to open new tab: {tested on chrome}

DEMO

$('a.site').each(function () {  
    var clk = document.createEvent("MouseEvents");
    clk.initMouseEvent("click", false, true, window, 0, 0, 0, 0, 0, true, false, false, true, 0, null);
    this.dispatchEvent(clk);
});