var xmlhttp;
function getXmlhttp(){
if(window.ActiveXObject){
	xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest){
	xmlhttp=new XMLHttpRequest();
	}
}
function finddata(){
	document.getElementById("btnYan").style.display="block";
	getXmlhttp();
	var name=document.form1.leaguername.value;	
	var url="regCheckName?name="+name;
	xmlhttp.open("get",url,true);
	xmlhttp.onreadystatechange=changehandle;
	xmlhttp.send(null);
}
function changehandle(){
	if(xmlhttp.readyState==4){	
		if(xmlhttp.status==200){	
			var flag=xmlhttp.responseText;								
			if(flag=="0"){								
				document.getElementById("btnYan").style.display="none";
				alert("数据连接错误!");
			}
			else if(flag=="1"){				
				document.getElementById("btnYan").style.display="none";
				alert("用户名已经存在!");
			}
			else if(flag == "2"){
				document.getElementById("btnYan").style.display="none";
				document.getElementById("btn").disabled=false;			
			}
		}
		else{
			alert(xmlhttp.responseText);
		}
	}
}
function check(){
	var name = document.form1.leaguername.value;
	if(name ==""){
		alert("用户名不能为空!");
		return false;
	}
	else{
		var str = new String();		
		str = /^[_\-\A-Za-z0-9]+$/;
		if(!name.match(str)){
			document.form1.leaguername.focus();
			alert("用户名由英文字母+数字组成!");
			return false;
		}
	}	
	var pwd = document.form1.pwd.value;
	if(pwd == ""){
		alert("密码不能为空！");
		return false;
	}
	var qrpwd = document.form1.qrpwd.value;
	if(pwd != qrpwd){
		alert("密码前后不一致!");
		return false;
	}
	var answer = document.form1.answer.value;
	if(answer == ""){
		alert("问题答案不能为空!");
		return false;
	}
}