function buildOptions(){
	var options = [];
	if(cat != ''){
		options.push({field : CAT_FIELD, value : cat});
	}
	return options;
}

function changeStep(){
	var changer = Ext.get('stepChanger').dom;
	step = 0 + changer.options[changer.selectedIndex].value;
	start = 0;
	go();
}

function changeCategory(){
	var changer = Ext.get('catChanger').dom;
	cat = changer.options[changer.selectedIndex].value;
	start = 0;
	go();
}

function hideAll(){
	if(Ext.get('submitbtn')){
		Ext.get('submitbtn').dom.style.display = 'none';
	}
}