var multiplier = 1;
var target_difference = 837;
var target_base = 3000;

function start_animation() {
	var func_el = set_animation();
    if(func_el.addEventListener){
        func_el.addEventListener('transitionend', reset_animation, true);
        func_el.addEventListener('webkitTransitionEnd', reset_animation, true);
    }
}

function set_animation() {
    if(document.querySelector){
        var el = document.querySelector('body');
        if(el.addEventListener){
        //jQuery("body").addClass("multiback").addClass("multibackprocess");
            el.className += ' multiback multibackprocess';
        }
        return el;
    }else{
        return false;
    }
}

function reset_animation() {
	multiplier++;
	var el = document.querySelector('body');
	el.style.backgroundPosition = '-'+((target_base + target_difference*1)*multiplier)+'px 0, -'+((target_base + target_difference*4)*multiplier)+'px 0';
}
jQuery(document).ready(function(){
    if(jQuery("body").hasClass("T7")) {start_animation();}
});