function clear_default_value(element_id) {
	if ($(element_id) != null) {
		if ($F(element_id) == $(element_id).defaultValue) {
			$(element_id).clear();
		}
	}
}

if ($('navigation-1') != null) {
	navigation_1_hover = function() {
		var sfEls = document.getElementById('navigation-1').getElementsByTagName('li');
		for (var i=0; i<sfEls.length; i++) {
			sfEls[i].onmouseover=function() {
				this.className+=' hover';
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(' hover\\b'), '');
			}
		}
	}
	if (window.attachEvent) window.attachEvent('onload', navigation_1_hover);
}

if ($('navigation-2') != null) {
	navigation_2_hover = function() {
		var sfEls = document.getElementById('navigation-2').getElementsByTagName('li');
		for (var i=0; i<sfEls.length; i++) {
			sfEls[i].onmouseover=function() {
				this.className+=' hover';
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(' hover\\b'), '');
			}
		}
	}
	if (window.attachEvent) window.attachEvent('onload', navigation_2_hover);
}