var f = {f:function(e){if(e.value==e.defaultValue){e.value=''}},b:function(e){if(e.value==''){e.value = e.defaultValue}}};

$(function(){
	$('#search_btn').click(function(){
		var $si = $('#search_input');
		var $sc = $('#search_category');
		
		if( $sc.val()==0 )
		{
			alert('请选择商品类别');
			$sc.focus();
			return false;
		}
		document.location.href = 'index.php?app=cb&block=search&search_key='+$si.val()+'&categoryId='+$sc.val();
		return false;
	});
	$('#search_form').submit(function(){
		$('#search_btn').click();
		return false;
	});
});