Abort any actions if one is already running:

var running = 0
function createSpecialEffects() {
        if(running==1) {
                return
        }
        // Cache needed elements
        elms = $$('div#products_new ul li a img');


        elms.each(function(slink) {

                slink.observe('mouseover', function(e) {
                        running=1
                        this.elm = Event.element(e);
                        this.elm_array = new Array();
                        this.elm_array = elms.without(this.elm);

                        this.elm_array.each(function(elms) {
                                elms.fade({
                                        duration: 0.5,
                                        to: 0.3,
                                        scope: 'specials',
                                        limit: '1',
                                        afterFinish:function()
{running=0}

                                });
                        });
                });

                slink.observe('mouseout', function(e) {
                        running=1
                        this.elm_array.each(function(elms) {
                                elms.appear({
                                        duration: 0.5,
                                        to: 1.0,
                                        scope: 'specials',
                                        limit: '1'
                                        afterFinish:function()
{running=0}
                                });
                        });

                });

        });


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