1，用户名不能包含空格，第一个字母不能为数字，长度控制
2，密码和验证码要相同，不能为空，等等，一些很基本的功能，但是确实挺烦人的。
javascript调试起来确实比较麻烦。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script language = "javascript">
function ger_code(code_length) {
var rand_aa="";
var code=new Array("0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F","G","H","I","J",
"K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","a","b","c","d","e","f","g","h",
"i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","!","@","#","$","%","&",
"*","(",")","-","_","|","?","/");
var code_Num=code.length; //数组长度
for(i=0;i<code_length;i++)
{
var ran_ss=parseInt(Math.random()*code_Num);
rand_aa+=String(code[ran_ss]);
}
document.write(" 验证码 <input type=text name=check_code size="+code_length+" value="+rand_aa+" class=blank_bg maxsize=5 readonly=true>");
}
function subTest(){
var name = document.testForm.userName.value;
var pass = document.testForm.userPassword.value;
var rePass = document.testForm.reUserPassword.value;
var check = document.testForm.checkCode;
if(name.length > 10 || name.length < 4){
alert("用户名长度必须大于等于4,小于等于10");
testForm.userName.focus();
return false;
}else if(isFirst()){
alert("用户名头字母不能为数字");
testForm.userName.focus();
&nb
