var clickClear = function(){
    $$('.click-clear').each(function(e){
        e.addEvent('click',clear);
    });
}
var clear = function(){
    this.removeEvent('click',clear);
    var replace = this.get('value');
    this.set('value','');
    this.addEvent('blur',function(){
        if (this.get('value') == '') {
            this.set('value',replace);
            this.addEvent('click',clear);
        }
    });
}

var currencies = function(){
    var sel = document.getElement('#change_currency');
    var btn = sel.getAllNext('button');
    if (btn) btn.setStyle('display','none');
    if (sel) sel.addEvent('change',function(e){
        var form = this.getParent('form');
        if (form) {
            e.preventDefault();
            e.stop();
            form.submit();
        }
    });
}

window.addEvent('load',clickClear);
window.addEvent('load',currencies);