xmlobj=false;
try {
	xmlobj = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
	try {
		xmlobj = new ActiveXObject("Microsoft.XMLHTTP");
	} catch (e2) {
		xmlobj = false;
	}
}
if (!xmlobj && typeof XMLHttpRequest != 'undefined') {
	xmlobj = new XMLHttpRequest();
}
if(!xmlobj){
	alert("xmlhttpobject create failed!");
}
//用户注册的ajax验证
function reg_ajax(ele,info){
	var v=$(ele).value;
	var url='../ajax/reg_ajax.php?user='+v;
	xmlobj.open('get',url);
	xmlobj.onreadystatechange=function(){
		var filter=/^\w{1,20}$/;
		//alert(!filter.test(v));
		if(!filter.test(v)){
			$(info).innerHTML='用户名应由数字字母下划线组成，且长度应在20个字符以内';
			return false;
		}
		if(v.length<1||v.length>20){
			$(info).innerHTML='用户名的长度应在20位以内';
			return false;
		}
		if(xmlobj.readtstate<4){
			$(info).innerHTML='Loading';
		}
		if(xmlobj.readystate==4&&xmlobj.status==200){
			$(info).innerHTML=xmlobj.responseText;
		}
	}
	xmlobj.send(null);
}
//获取价格的ajax
function get_price(pid){
	var v=$('shuliang').value;
	var url='../ajax/getprice_ajax.php?num='+v+'&pid='+pid;
	xmlobj.open('get',url);
	xmlobj.onreadystatechange=function(){
		if(xmlobj.readtstate<4){
		}
		if(xmlobj.readystate==4&&xmlobj.status==200){
			$('jiage').value=xmlobj.responseText;
		}
	}
	xmlobj.send(null);
}
//省份城市二级联动菜单ajax特效
function show_city(e){
	var pv=$(e).value;
	if(pv==''){
		return;
	}
	var url='../view/ajax/city_ajax.php?pv='+pv;
	if(arguments[1]){
		var url='../../view/ajax/city_ajax.php?pv='+pv;
	}
	xmlobj.open('get',url);
	xmlobj.onreadystatechange=function(){
		if(xmlobj.readystate==4&&xmlobj.status==200){
			citys=xmlobj.responseText;
			city=citys.split('-');
			$('city').options.length=0;//清空select item
			for(i=0;i<city.length;i++){
				var ic=new Option(city[i],city[i]);
				$('city').options.add(ic);//循环添加select item
			}
		}
	}
	xmlobj.send(null);
}