Update Date values in Salesforce Custom button

Update Date values in Salesforce Custom button

to example to update the date custom field called AssignementDate__c field in Lead object then use the below code in the custom button logic

var lead = new sforce.SObject(“Lead”);
lead.AssignementDate__c = new Date();
lead.Id = “{!lead.Id}”;
updateLead = sforce.connection.update([lead]);