一些常用的JAVAscript代码

function checkUserReg(action)
{if(action=="add"){
if(document.UserRegister.username.value=="")
 {
  document.UserRegister.username.focus();
  alert("对不起，请输入您的用户名！");
  return false;
 
 }
if(document.UserRegister.username.value.length<4)
 {
  document.UserRegister.username.focus();
  alert("对不起,用户名应在4个或4个字符以上，请重新输入！");
  return false;
 
 }

if(document.UserRegister.password.value=="")
 {
  document.UserRegister.password.focus();
  alert("对不起，请输入您的用户密码！");
  return false;
 
 }
if(document.UserRegister.password.value.length<6)
 {
  document.UserRegister.password.focus();
  alert("对不起，密码应在6个字符以上，请重新输入！");
  return false;
 
 }

if(document.UserRegister.repassword.value=="")
 {
  document.UserRegister.repassword.focus();
  alert("对不起，请输入确定密码！");
  return false;
 
 }

if(document.UserRegister.repassword.value!=document.UserRegister.password.value)
       {
         document.UserRegister.password.focus();
         alert("对不起，两次输入的密码不一样，请重新输入！");
         document.UserRegister.password.value="";
         document.UserRegister.repassword.value="";
         return false;
        }

if(document.UserRegister.zsname.value=="")
        {document.UserRegister.zsname.focus();
         alert("对不起,请输入真实姓名！");
         return false;
         }

if(document.UserRegister.telephone.value=="")
{document.UserRegister.telephone.focus();
alert("对不起,请输入联系电话！");
 return false;
}

var tel = "0123456789";
for (i=0; i< document.UserRegister.telephone.value.length; i++)
{
 
var CheckChar = document.UserRegister.telephone.value.charAt(i);
if (tel.indexOf(CheckChar) == -1||document.UserRegister.telephone.value.length<10||document.UserRegister.telephone.value.length>12)
{
 alert("对不起，请输入正确的电话号码！");
 document.UserRegister.telephone.focus();
 return false;
 
}
}

 

 

if(document.UserRegister.email.value==""){
document.UserRegister.email.focus(); 
alert("对不起,请输入Email");
  return false;

}

if(document.UserRegister.email.value.charAt(0)=="." ||       
         document.UserRegister.email.value.charAt(0)=="@"||      
         document.UserRegister.email.value.indexOf('@', 0) == -1 ||
         document.UserRegister.email.value.indexOf('.', 0) == -1 ||
         document.UserRegister.email.value.lastIndexOf("@")
==document.UserRegister.email.value.length-1 ||document.UserRegister.email.value.lastIndexOf(".")
==document.UserRegister.email.value.length-1
){document.UserRegister.email.focus();
  alert("对不起,请输入正确Email");
  return false;

}

if(document.UserRegister.address.value==""){
document.UserRegister.address.focus(); 
alert("对不起,请输入通讯地址");
  return false;

}

if(document.UserRegister.zipcode.value==""){
document.UserRegister.zipcode.focus(); 
alert("对不起,请输入邮政编码");
  return false;

}

var youpian = "0123456789";
for (i=0; i< document.UserRegister.zipcode.value.length; i++)
{
 
var CheckChar = document.UserRegister.zipcode.value.charAt(i);
if (youpian .indexOf(CheckChar) == -1||document.UserRegister.zipcode.value.length!=6)
{
 alert("对不起，请输入正确的邮政编码！");
 document.UserRegister.zipcode.focus();
 return false;
 
}

if(document.UserRegister.idcard.value==""){
document.UserRegister.idcard.focus(); 
alert("对不起,请输入信用卡号");
  return false;

}

var idca = "0123456789";
for (i=0; i< document.UserRegister.idcard.value.length; i++)
{
 
var CheckChar = document.UserRegister.idcard.value.charAt(i);
if (idca.indexOf(CheckChar) == -1||document.UserRegister.idcard.value.length!=16)
{
 alert("对不起，请输入正确的信用卡号！");
 document.UserRegister.idcard.focus();
 return false;
 
}
}
}document.all.item("action").value=action;
        document.UserRegister.submit();
    }}

 

 

 

<script language=javascript> 
//CharMode函数
//source:www.web2bar.cn 
//测试某个字符是属于哪一类. 
function CharMode(iN){ 
if (iN>=48 && iN <=57) //数字 
return 1; 
if (iN>=65 && iN <=90) //大写字母 
return 2; 
if (iN>=97 && iN <=122) //小写 
return 4; 
else 
return 8; //特殊字符 
} 
//bitTotal函数 
//计算出当前密码当中一共有多少种模式 
function bitTotal(num){ 
modes=0; 
for (i=0;i<4;i++){ 
if (num & 1) modes++; 
num>>>=1; 
} 
return modes; 
} 
//checkStrong函数 
//返回密码的强度级别 
function checkStrong(sPW){ 
if (sPW.length<=4) 
return 0; //密码太短 
Modes=0; 
for (i=0;i<sPW.length;i++){ 
//测试每一个字符的类别并统计一共有多少种模式. 
Modes|=CharMode(sPW.charCodeAt(i)); 
} 
return bitTotal(Modes); 
} 
//pwStrength函数 
//当用户放开键盘或密码输入框失去焦点时,根据不同的级别显示不同的颜色 
function pwStrength(pwd){ 
O_color="#eeeeee"; 
L_color="#FF0000"; 
M_color="#FF9900"; 
H_color="#33CC00"; 
if (pwd==null||pwd==''){ 
Lcolor=Mcolor=Hcolor=O_color; 
} 
else{ 
S_level=checkStrong(pwd); 
switch(S_level) { 
case 0: 
Lcolor=Mcolor=Hcolor=O_color; 
case 1: 
Lcolor=L_color; 
Mcolor=Hcolor=O_color; 
break; 
case 2: 
Lcolor=Mcolor=M_color; 
Hcolor=O_color; 
break; 
default: 
Lcolor=Mcolor=Hcolor=H_color; 
} 
}
document.getElementById("strength_L").style.background=Lcolor; 
document.getElementById("strength_M").style.background=Mcolor; 
document.getElementById("strength_H").style.background=Hcolor; 
return; 
} 
</script> 
<form name=form1 action="" > 
输入密码:
<input type=password size=10 onKeyUp=pwStrength(this.value)
onBlur=pwStrength(this.value)> 
<br>密码强度: 
<table width="217" border="1" cellspacing="0" cellpadding="1" bordercolor="#cccccc"
height="23" style='display:inline'> 
<tr align="center" bgcolor="#eeeeee"> 
<td width="33%" id="strength_L">弱</td> 
<td width="33%" id="strength_M">中</td> 
<td width="33%" id="strength_H">强</td> 
</tr> 
</table>
</form>