function check_reg_userno(userno){
			var reSn=/^[a-z]\w*$/;
			var b_sn=reSn.test(userno);

			if(userno.length<4 || !b_sn) {	
				document.getElementById("span_reg_userno").innerHTML="请填写您注册时的用户名";
				document.getElementById("span_reg_userno").className="hintno";
				document.getElementById("user_no").className="inputno";
				return false;		
			}else{
				document.getElementById("span_reg_userno").innerHTML=" ";
				document.getElementById("span_reg_userno").className="hintok";
				document.getElementById("user_no").className="inputc";
				 return true;	
			}
}

function check_reg_userpass(userpass){
			var reSn=/^[a-z]\w*$/;
			var b_pass=reSn.test(userpass);

			if(userpass.length<4 || !b_pass) {	
				document.getElementById("span_reg_pass").innerHTML="新密码必须由4-16位小写英文或数字下划线等组成";
				document.getElementById("span_reg_pass").className="hintno";
				document.getElementById("userpass").className="inputno";
				return false;		
			}else{
				document.getElementById("span_reg_pass").innerHTML="&nbsp;&nbsp;";			
				document.getElementById("span_reg_pass").className="hintok";
				document.getElementById("userpass").className="inputc";
				 return true;	
		}
}
function check_reg_userpass1(userpass){

			var repass=document.getElementById("userpass").value;

			if (userpass!=repass) {	

				document.getElementById("span_reg_pass1").innerHTML="两次密码不一致。";
				document.getElementById("span_reg_pass1").className="hintno";
				document.getElementById("reuserpass").className="inputno";
				return false;	
				}else{
				document.getElementById("span_reg_pass1").innerHTML="&nbsp;&nbsp;";
				document.getElementById("span_reg_pass1").className="hintok";
				document.getElementById("reuserpass").className="inputc";
				return true;	
	
		}
}
function check_reg_email(useremail){
			var reEmail=/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;
			var b_email=reEmail.test(useremail);
				if(!b_email){
					document.getElementById("span_reg_email").innerHTML="请正确您注册时填写的邮箱地址。";
					document.getElementById("span_reg_email").className="hintno";
					document.getElementById("useremail").className="inputno";
					return false;
					}else{
					document.getElementById("span_reg_email").innerHTML="&nbsp;&nbsp;";			
					document.getElementById("span_reg_email").className="hintok";
					document.getElementById("useremail").className="inputc";
					return true;		
					}
				}

function submitCheck(){
	var refalg=false;
	var f1,f2,f3,f4;
	f1 = check_reg_userno(document.repass.user_no.value);
	f2 = check_reg_userpass(document.repass.userpass.value);
	f3 = check_reg_userpass1(document.repass.reuserpass.value);
	f4 = check_reg_email(document.repass.useremail.value);
 	refalg = f1 && f2 && f3 && f4 ;
	    return(refalg);

}