//oncontextmenu
window.onload = function(){
    //var imgs = [];
    var all_img = document.getElementsByTagName('img'), rel;
    for(var i = 0, len = all_img.length; i < len; ++i){
        all_img[i].oncontextmenu = function() { 
            //alert('右クリック禁止です');
            return false;
        }
        /*rel = all_img[i].getAttribute('rel');
        if(rel && RE.rel.test(rel)) imgs[imgs.length] = all_img[i];*/
    }
}