function getModels(brand_id, oDummy, oDummy2, oDummy3){
	oDummy.innerHTML = '<div class="pleasewait"></div>';
	oDummy3.innerHTML = oDummy2.innerHTML = '';
	var request = httpRequest();
	var func = function(){
		oDummy.innerHTML = request.responseText;
	}
	makeRequest(request, func, './get_inf/', 'POST', 'brand_id=' + brand_id);
}

function getProps(model_id, oDummy, oDummy2){
	oDummy.innerHTML = '<div class="pleasewait"></div>';
	oDummy2.innerHTML = '';
	var request = httpRequest();
	var func = function(){
		oDummy.innerHTML = request.responseText;
	}
	makeRequest(request, func, './get_inf/', 'POST', 'model_id=' + model_id);
}

function getChains(prop_id, oDummy){
	oDummy.innerHTML = '<div class="pleasewait"></div>';
	var request = httpRequest();
	var func = function(){
		oDummy.innerHTML = request.responseText;
	}
	makeRequest(request, func, './get_inf/', 'POST', 'prop_id=' + prop_id);
}