function init(){  
		   var checkname=document.getElementById("checkname").innerHTML;
		   var Submit=document.getElementById("Submit");
		   var passwords=document.getElementById("passwords").value;
		   var code=document.getElementById("code").value;
		   var Vdisable=true; 
		        Note('ErrDiv');
				
			if(checkname.indexOf('Email available!')<0){
			    Vdisable=false;			
			}
			 
	       if(passwords=='' || passwords.length<4  || passwords.length>20){
		     Vdisable=false;	
		   }
		  
		   if(code==''){
		     Vdisable=false;	
		   }
			
			 var ErrInfo='Sorry, two times inputs the content is inconsistent!';
			 var CorrectInfo='your enter [Password] is right .';
			 if(!ChkTheSame('passwords','password1','Submit','password1_div',ErrInfo,CorrectInfo,'')){
			  Vdisable=false;				
			 }
		  
		
			if(Vdisable==true){
				Submit.disabled=false;
				return true;
			}else{
			    Submit.disabled=true;
				return false;
			} 	           
      } 
	
	function CheckName(username){//判断该用户邮箱是否已经注册
		var infodiv= 'checkname';
		var method='GET';
		var url='CheckName.php?uname='+ username;
		var success='';
		var error='';	
		chkElement(method,url,infodiv,success,error);	
	}
 
 window.onload=function(){
      init();
	  Checklogin();
 }