$.extend({   password: function (length, special) {     var iteration = 0;     var password = "";     var randomNumber;     if(special == undefined){         var special = false;     }     while(iteration < length){         randomNumber = (Math.floor((Math.random() * 100)) % 94) + 33;         if(!special){             if ((randomNumber >=33) && (randomNumber <=47)) { continue; }             if ((randomNumber >=58) && (randomNumber <=64)) { continue; }             if ((randomNumber >=91) && (randomNumber <=96)) { continue; }             if ((randomNumber >=123) && (randomNumber <=126)) { continue; }         }         iteration++;         password += String.fromCharCode(randomNumber);     }     return password;   } }); // How to use $.password(8); $.password(12, true);