Generate Random Password on Button Click in Salesforce

On Click Button Generate Password

Button Code

//Connection

{!REQUIRESCRIPT("/soap/ajax/37.0/connection.js")} 

var p = new sforce.SObject("Contact"); 

p.id = "{!Contact.Id}"; 

if(confirm('Are you sure you want to generate a new password for this Contact?')==true){ 

var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz"; 

var string_length = 8; 

var randomstring = ''; 

//random password generate logic

for(var i=0; i<string_length; i++){ 

var rnum = Math.floor(Math.random() * chars.length); 

randomstring += chars.substring(rnum,rnum+1); 

} 

//assign random generated password

p.Password__c = randomstring; 

} 

//Update contact

result = sforce.connection.update([p]); 

//reload page

location.reload(true);

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