function InitAjax()
{
var ajax=false;
try {
ajax = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
ajax = new ActiveXObject("Microsoft.XMLHTTP");
} catch (E) {
ajax = false;
}
}
if (!ajax && typeof XMLHttpRequest!='undefined') {
ajax = new XMLHttpRequest();
}
return ajax;
}

function getUsers()
{

var show = document.getElementById("dns");
var name=document.getElementById('username');
var url = "getuser.php?name="+name.value;

var ajax = InitAjax();

ajax.open("GET", url, true);

ajax.onreadystatechange = function() {
if (ajax.readyState == 4 && ajax.status == 200) {
if(ajax.responseText=='yes')
show.innerHTML = "<div class='regright'><img src='images/li_ok.gif'>&nbsp;恭喜此用户名可以注册！</a></div>";
else
show.innerHTML = "<div class='regerroh'><img src='images/li_err.gif'>&nbsp;您所填写的用户名已被注册！</a></div>";
}
}

ajax.send(null);
}

function Qcode(){ 
	var code=document.getElementById('validate');
	var url = "getuser.php?name=code";
	var Code_ajax = InitAjax();
	
	Code_ajax.open("GET", url, true);
	
	Code_ajax.onreadystatechange = function() {
		if (Code_ajax.readyState == 4 && Code_ajax.status == 200) {
			document.getElementById('quscode').innerHTML = Code_ajax.responseText;
		}else{
			document.getElementById('quscode').innerHTML ='<font color=red>请得新获取</font>';
		}
	}
		Code_ajax.send(null);
}