Password Generator JavaScript Code

Just enter the type of password you want, and how long it should be and it generates your password instantly. This password generator will randomly generate one to twenty words in the password from the uppercase, lowercase and numeric characters.

You can add this code to your web page to let your users create a password is not easy to be cracked. Suitable for use in member registration page and other pages require a password.

Script Demo:

Demo

JavaScript Code:

Insert this code into <head> tags

<script language="javascript">
<!-- Original:  Rob Kroll (rkroll@istar.ca) -->



<!-- Begin
function generate(form) {
var type=form.type.selectedIndex;
if (type<4) {
var selectionarray=new Array(62)
selectionarray[1]="A";
selectionarray[2]="B";
selectionarray[3]="C";
selectionarray[4]="D";
selectionarray[5]="E";
selectionarray[6]="F";
selectionarray[7]="G";
selectionarray[8]="H";
selectionarray[9]="I";
selectionarray[10]="J";
selectionarray[11]="K";
selectionarray[12]="L";
selectionarray[13]="M";
selectionarray[14]="N";
selectionarray[15]="O";
selectionarray[16]="P";
selectionarray[17]="Q";
selectionarray[18]="R";
selectionarray[19]="S";
selectionarray[20]="T";
selectionarray[21]="U";
selectionarray[22]="V";
selectionarray[23]="W";
selectionarray[24]="X";
selectionarray[25]="Y";
selectionarray[26]="Z";
selectionarray[27]="0";
selectionarray[28]="1";
selectionarray[29]="2";
selectionarray[30]="3";
selectionarray[31]="4";
selectionarray[32]="5";
selectionarray[33]="6";
selectionarray[34]="7";
selectionarray[35]="8";
selectionarray[36]="9";
selectionarray[37]="a";
selectionarray[38]="b";
selectionarray[39]="c";
selectionarray[40]="d";
selectionarray[41]="e";
selectionarray[42]="f";
selectionarray[43]="g";
selectionarray[44]="h";
selectionarray[45]="i";
selectionarray[46]="j";
selectionarray[47]="k";
selectionarray[48]="l";
selectionarray[49]="m";
selectionarray[50]="n";
selectionarray[51]="o";
selectionarray[52]="p";
selectionarray[53]="q";
selectionarray[54]="r";
selectionarray[55]="s";
selectionarray[56]="t";
selectionarray[57]="u";
selectionarray[58]="v";
selectionarray[59]="w";
selectionarray[60]="x";
selectionarray[61]="y";
selectionarray[62]="z";
var length=62;
  }
if (type<3) {
var selectionarray=new Array(36);
selectionarray[1]="a";
selectionarray[2]="b";
selectionarray[3]="c";
selectionarray[4]="d";
selectionarray[5]="e";
selectionarray[6]="f";
selectionarray[7]="g";
selectionarray[8]="h";
selectionarray[9]="i";
selectionarray[10]="j";
selectionarray[11]="k";
selectionarray[12]="l";
selectionarray[13]="m";
selectionarray[14]="n";
selectionarray[15]="o";
selectionarray[16]="p";
selectionarray[17]="q";
selectionarray[18]="r";
selectionarray[19]="s";
selectionarray[20]="t";
selectionarray[21]="u";
selectionarray[22]="v";
selectionarray[23]="w";
selectionarray[24]="x";
selectionarray[25]="y";
selectionarray[26]="z";
selectionarray[27]="0";
selectionarray[28]="1";
selectionarray[29]="2";
selectionarray[30]="3";
selectionarray[31]="4";
selectionarray[32]="5";
selectionarray[33]="6";
selectionarray[34]="7";
selectionarray[35]="8";
selectionarray[36]="9";
var length=36;
  }
if (type<2) {
var selectionarray=new Array(36);
selectionarray[1]="A";
selectionarray[2]="B";
selectionarray[3]="C";
selectionarray[4]="D";
selectionarray[5]="E";
selectionarray[6]="F";
selectionarray[7]="G";
selectionarray[8]="H";
selectionarray[9]="I";
selectionarray[10]="J";
selectionarray[11]="K";
selectionarray[12]="L";
selectionarray[13]="M";
selectionarray[14]="N";
selectionarray[15]="O";
selectionarray[16]="P";
selectionarray[17]="Q";
selectionarray[18]="R";
selectionarray[19]="S";
selectionarray[20]="T";
selectionarray[21]="U";
selectionarray[22]="V";
selectionarray[23]="W";
selectionarray[24]="X";
selectionarray[25]="Y";
selectionarray[26]="Z";
selectionarray[27]="0";
selectionarray[28]="1";
selectionarray[29]="2";
selectionarray[30]="3";
selectionarray[31]="4";
selectionarray[32]="5";
selectionarray[33]="6";
selectionarray[34]="7";
selectionarray[35]="8";
selectionarray[36]="9";
var length=36;
}
var lngth=form.length.selectedIndex;
var i,j;
var tmpstr;
tmpstr="";
i=0;
do {
{
var randscript = -1
while (randscript < 1 || randscript > length || isNaN(randscript))
{randscript = parseInt(Math.random()*(length))}
j=randscript}
tmpstr=tmpstr+selectionarray[j]
i=i+1}
while (i<lngth)
form.password.value = tmpstr;
}
//  End -->
</script>

Insert this code into <body> tags

<center>
<form>
<select name="type">
<option selected>Choose Type
<option>Uppercase letters and numbers
<option>Lowercase letters and numbers
<option>Mixed case letters and numbers
</select>
<select name="length">
<option selected>Choose length
<option>1 Character
<option>2 Characters
<option>3 Characters
<option>4 Characters
<option>5 Characters
<option>6 Characters
<option>7 Characters
<option>8 Characters
<option>9 Characters
<option>10 Characters
<option>11 Characters
<option>12 Characters
<option>13 Characters
<option>14 Characters
<option>15 Characters
<option>16 Characters
<option>17 Characters
<option>18 Characters
<option>19 Characters
<option>20 Characters
</select>
<br>
Your random password is: <input type=text name=password size=20><br>
<input type="button" value="Generate Password" onclick="generate(this.form)">
</form>
</center>

Instruction:

Webmaster » Web Programming » JavaScript » Password Protection » Password Generator Code

Related Links:

Home | Sitemap | Bookmark This Page

Sponsored Links

Recommended Links