var szNormal = 150, szSmall  = 100, szFull   = 290;

var kwicks = $$("#kwick a");
var fx = new Fx.Elements(kwicks, {wait: false, duration: 300, transition: Fx.Transitions.Back.easeOut});
kwicks.each(function(kwick, i) {
    kwick.addEvent("mouseenter", function(event) {
        var o = {};
        o[i] = {width: [kwick.getStyle("width").toInt(), szFull]}
        kwicks.each(function(other, j) {
	        if(i != j) {
		        var w = other.getStyle("width").toInt();
		        if(w != szSmall) o[j] = {width: [w, szSmall]};
	        }
        });
        fx.start(o);
    });
});

$("kwick").addEvent("mouseleave", function(event) {
    var o = {};
    kwicks.each(function(kwick, i) { o[i] = {width: [kwick.getStyle("width").toInt(), szNormal]} });
	fx.start(o);
});