JS's judgment on the strength of the password

<div class= "Email_reg M_part" >
<form class= "Reg_form" id= "Reg_form" >
<p> Email Registration </p>
<div class= "Control" >
<label> email </label><input class= "email" name= "Email" >
<span> please fill in my usual email address, which will be used as login account </span>
</div>
<div class= "Control" >
<label> password </label><input type= "password" name= "password" >
<span> letters, numbers or English symbols, 6-20-bit </span>
</div>
<div class= "Control" >
<label> Confirm password </label><input type= "password" name= "Confirmpwd" >
<span> Please enter your password again </span>
</div>
<input class= "Submit" id= "submit_btn" onclick= "return false" type= "submit" value= "register" >
</form>
</div>

<script>

$ ("#reg_form"). Validate ({
Ok:function () {
Alert ("Login! ");
}
});

</script>

(function (jQuery) {
"Use strict";
(function (factor) {
if (jQuery &&!jquery.fn.validate) {
Factor ($);
}
}) (function ($) {
var Flagall = {
Email:false,
Password:false,
Samepwd:false
};
var methods = {
Settings:null,
Init:function (item) {
Methods.settings = $.extend (True,{},$.fn.validate.defaults,item);
Return This.each (function () {
var cur = $ (this);
var Checkitem = Cur.find ("input[name]");
Methods.subcheck (cur);
Methods.checkitem (Checkitem);
});
},
Subcheck:function (Box) {
var btn = box.find ("input[type= ' Submit ']");
Btn.on ("click", Function () {
Methods.allcheck (box);
});
},
Allcheck:function (Box) {
var Checkitem = Box.find ("input[name]");
$.each (Checkitem,function (i,v) {
var cur = $ (v);
Methods.bluee (cur);
METHODS.CHECKFMT (cur);
});
if (flagall.email && flagall.password && flagall.samepwd) {
Alert ("Submit");
}
},
Checkitem:function (item) {
$.each (Item,function () {
var cur = $ (this);
Methods.checksingle (cur);
});
},
Checksingle:function (item) {
Item.on ("Blur", function () {
Methods.bluee (item);
METHODS.CHECKFMT (item);
});
Item.keydown (function (e) {
var code = E.keycode;
if (code = = 13) {
Methods.allcheck (item);
}
}). KeyUp (function (e) {
Methods.bluee (item);
});
},
Bluee:function (item) {
var val = item.val ();
if (val = = "") {
var txt = methods.gettype (item);
Methods.errorinfo (Item,txt);
}else{
var error = Item.next (". Error");
Error.length > 0? Error.remove (): ";
METHODS.CHECKFMT (item); Edge Input Change Verification
}
},
Gettype:function (item) {
var type = item.attr ("name");
var txt = "";
Switch (type) {
Case "Email":
txt = METHODS.SETTINGS.EMAILTXT;
Break
Case "Password":
txt = METHODS.SETTINGS.PWDTXT;
Break
Case "Confirmpwd":
txt = METHODS.SETTINGS.CONFIRMTXT;
Break
}
return txt;
},
Checkfmt:function (item) {
var val = item.val ();
var type = item.attr ("name");
Switch (type) {
Case "Email":
METHODS.CHECKEMAILFMT (Item,val);
Break
Case "Password":
METHODS.CHECKPWDFMT (Item,val);
Break
Case "Confirmpwd":
METHODS.CHECKPWDFMT (item,val,true);
}
},
Checkemailfmt:function (item,val) {
var reg,info;
Reg =/^ ([a-za-z0-9_-]) [email protected] ([a-za-z0-9_-]) + (\.com) $/;
info = "Email address is not correct, please re-enter";
var flag = Reg.test (val);
if (flag) {
Flagall.email= true;
}else{
Methods.errorinfo (Item,info);
Flagall.email = false;
}
},

Checkpwdfmt:function (item,val,state) {
var reg,info;
Reg =/^[-,.?:; ' " ~ ~ ' #%<>=_\@\*\$\^\&\ (\) \{\}\[\]\/| 0-9 | A-Z |a-z]{6,20}$/;
info = "Please enter 6-20 digits of reasonable character";
var flag = Reg.test (val);
if (flag) {
if (state) {
Methods.checkdoublepwd (Val,item);
}else{
Methods.checksafe (Val,item);
flagall.password= true;
}
}else{
Methods.errorinfo (Item,info);
State? Flagall.samepwd = False:flagAll.password = false;
}
},
Checkdoublepwd:function (Val,item) {
var pwd = $ ("input[name= ' password ')"). Val ();
if (pwd! = val) {
Flagall.samepwd = false;
var txt = "Two times password inconsistent, please re-enter";
Methods.errorinfo (Item,txt);
}else{
Flagall.samepwd = true;
}
},
Checksafe:function (Val,item) {
var Modes;
for (Var i=0;i<val.length;i++) {
Password mode
Modes|=methods. Charmode (Val.charcodeat (i));
}
var level = Methods.bittotal (Modes);
Methods.showlevel (Level,item);
},
Showlevel:function (Level,item) {
Switch (level) {
Case 1:
var txt = "Password set too simple, security weak";
Methods.errorinfo (item,txt, "error");
Break
Case 2:
var txt = "Password security";
Methods.errorinfo (Item,txt, "middlepwd");
Break
Default:
var txt = "Password security strong";
Methods.errorinfo (Item,txt, "strongpwd");
}
},
Charmode:function (in) {
if (in>=48 && in <=57)//Digital
return 1;
if (in>=65 && in <=90)//Uppercase
return 2;
if (in>=97 && in <=122)//lowercase
return 4;
Else
return 8;
},
Bittotal:function (num) {
var modes=0;
for (Var i=0;i<6;i++) {
if (num & 1) modes++;
num>>>=1;
}
return modes;
},
/*checksafe:function (Val,item) {
var reg1 =/^\d+$/,
REG2 =/^[a-za-z]$/,
Reg3 =/^ (\d*) ([a-za-z]{1,2}) (\d*) $/,
REG4 =/^ ([a-za-z]*) (\d{1,2}) ([a-za-z]*] $/;
var regm =/^ ([a-za-z0-9]*) ([-,.?:; ' " ~ ' #%<>=_\@\*\$\^\&\ (\) \{\}\[\]\/]{1,2}) ([a-za-z0-9]*) $/;
if (Reg1.test (val) | | | reg2.test (val) | | reg3.test (val) | | reg4.test (val)) && val.length = = 6) {
var txt = "Password set too simple, security weak";
Methods.errorinfo (item,txt, "error");
}else if (Regm.test (val)) {
var txt = "Password security";
Methods.errorinfo (Item,txt, "middlepwd");
}else{
var txt = "Password security strong";
Methods.errorinfo (Item,txt, "strongpwd");
}
},*/
Errorinfo:function (ITEM,TXT,CLS) {
var scls = CLS | | "Error";
var div = "<span class= ' Validate_cls" +scls+ ">" +txt+ "</span>";
if (Item.next (". Validate_cls"). Length = = 0) {
$ (div). InsertAfter (item);
}else{
var box = Item.next (". Validate_cls");
box.html (TXT). Removeclass (). addclass ("Validate_cls"). addclass (SCLS);
}
}
};
$.fn.validate = function (param) {
Return methods.init.apply (This,param);
};
$.fn.validate.defaults = {
Emailtxt: "Please enter your mailbox",
Pwdtxt: "Please enter your password",
Confirmtxt: "Please Confirm password"
};
});
}) (JQuery);

JS's judgment on the strength of the password