function doDefault(trigger, target, values) {
    var targetField = document.getElementById(target);
    if (targetField != null) {
        var i = 0;
        var keepChecking = true;
        while (keepChecking) {
            if (values["t" + i]) {
                var triggerValue = values["t" + i];
                var effectValue = values["e" + i];
                if (trigger.value == triggerValue) {
                    targetField.value = effectValue;
                    return;
                }
            } else {
                keepChecking = false;
            }
            i++;
        }
    } else {
        alert("Failed to find field: " + target + " for defaulting");
    }
    return;
}
function validateTimeEntry(field) {
    if (field.value != null && field.value.length > 0) {
        var valid = true;
        var value = field.value;
        value = value.replace(":", "");
        if (isNumeric(value)) {
            if (value.length == 1) {
                value = "0" + value + ":00";
            } else if (value.length == 2) {
                value = value + ":00";
            } else if (value.length == 4) {
                value = value.substring(0, 2) + ":" + value.substring(2);
            }
            if (isTime(value)) {
                field.value = value;
            } else {
                valid = false;
            }
        } else {
            valid = false;
        }
        if (valid == false) {
            alert(field.value + " is not a valid time.");
            field.value = "";
            field.focus();
        }
    }
    return;
}
function isNumeric(s) {
    var r = /^[0-9]*$/;
    return r.test(s);
}
function isTime(s) {
    var r = /^([0-1][0-9]|[2][0-3]):([0-5][0-9])$/;
    return r.test(s);
}
var KeySubmitableForm = Class.create();
KeySubmitableForm.prototype = {
    initialize: function(f) {
        this.form = f;
        var elements = Form.getElements(f);
        for (var i = 0; i < elements.length; i++) {
            Event.observe(elements[i], "keydown", this.submitOnEnter.bind(this));
        }
    },
    
    submitOnEnter: function(e) {
        if (e.keyCode == Event.KEY_RETURN) {
            this.form.submit();
            return false;
        }
        return true;
    }
}

Event.observe(window, "load", function() {
    var forms = $$("form.keysubmitable");
    if (forms != null) {
        for (var i = 0; i < forms.length; i++) {
            new KeySubmitableForm(forms[i]);
        }
    }
});

var Gaia = { };

Gaia.KB = {
    init: function() {
        var tagCloud = $("tagcloud");
        tagCloud.select("span").each(function(s) {
            var text = s.innerHTML;
            s.style.cursor = "pointer";
            Event.observe(s, "click", Gaia.KB.open.bind(Gaia.KB, text));
        });
    },

    open: function(text) {
        window.location = "searchTag.php?tag=" + text;
    }
};