URL validation with jQuery validate plugin

I am using jQuery validation plugin URL validation for url validation. I ve added url:true to validate all valid URLs. The Validation plugin is great with the default functions it offers. It accepts the urls started with http(s). For example https://www.yammer.com It throws error when the URL is not started with http(s) For example www.yammer.com. JS $( "#myform" ).validate({ rules: { field: { required: true, url: true } } }); If the entered Url is not started with http(s), I want to add http(s) before validation. I don't want the URL to be validated with regular expressions. Because they are making lot of confusions. How can I add http/https before validation. If the entered URL is started with http(s) there is no problem.