JS to determine password strength

HTML code:

1 <formname= "Form1"Action="">2Password:<inputtype= "Password"size= "8"onkeyup= "Pwstrength (this.value)"onblur= "Pwstrength (this.value)">3     <BR>4 Password Strength:5     <Tablewidth= "220px"Border= "1"cellspacing= "0"cellpadding= "1"bordercolor= "#eeeeee"Height= "22px">6         <TRAlign= "Center"bgcolor= "#f5f5f5">7             <TDwidth= "33%"ID= "strength_l">Weak</TD>8             <TDwidth= "33%"ID= "Strength_m">In</TD>9             <TDwidth= "33%"ID= "Strength_h">Strong</TD>Ten         </TR> One     </Table> A </form>

JS Code:

1 functionPwdstrength (pwd) {2O_color = "#eeeeee";3L_color = "#FF0000";4M_color = "#FF9900";5H_color = "#33CC00";6     varLevel = 0, strength = "O";7     if(pwd = =NULL|| PWD = = ") {8Strength = "O";9Lcolor = Mcolor = Hcolor =O_color;Ten     } One     Else { A         varmode = 0; -         if(Pwd.length <= 4) -mode = 0; the         Else { -              for(i = 0; i < pwd.length; i++) { -                 varCharmode, CharCode; -CharCode =pwd.charcodeat (i); +                 //determine the type of password entered -                 if(CharCode >= && charcode <= 57)//Digital +Charmode = 1; A                 Else if(CharCode >= && charcode <= 90)//Uppercase atCharmode = 2; -                 Else if(CharCode >= && charcode <= 122)//lowercase -Charmode = 4; -                 Else -Charmode = 8; -Mode |=Charmode; in             } -             //Calculate password Mode toLevel = 0; +              for(i = 0; i < 4; i++) { -                 if(Mode & 1) thelevel++; *Mode >>>= 1; $             }Panax Notoginseng         } -         Switch(level) { the              Case0: +Strength = "O"; ALcolor = Mcolor = Hcolor =O_color; the                  Break; +              Case1: -Strength = "L"; $Lcolor =L_color; $Mcolor = Hcolor =O_color; -                  Break; -              Case2: theStrength = "M"; -Lcolor = Mcolor =M_color;WuyiHcolor =O_color; the                  Break; -             default: WuStrength = "H"; -Lcolor = Mcolor = Hcolor =H_color; About                  Break; $         } -     } -document.getElementById ("strength_l"). Style.background =Lcolor; -document.getElementById ("Strength_m"). Style.background =Mcolor; Adocument.getElementById ("Strength_h"). Style.background =Hcolor; +     returnstrength; the}