jQuery(document).ready(function(){
  jQuery("a.blank").click(function(){
    var _c = jQuery(this).attr("class").split(" ");
    var _d = _c[1];
    var _e = _d.replace("img","");
    var _f = _e.split("x");
    //console.log(_f);
    window.open(this.href,'','width='+_f[0]+',height='+_f[1]);
    return false;
  });
});