Regular Expression for URL by javascript in CRM 2016

Hi All,

I'm trying to apply regular exp. for URL which should accept normal standard 

but it is not happening 

here is the code :

function URLtest() {
//var alertreq = false;
var testres = true;

var URLvali = "/(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/";
var name = Xrm.Page.getAttribute("new_websiteurl").getValue();//nameeld where u want to check the special character
for (var i = 0; i < name.length; i++) {
if (URLvali.indexOf(name.charAt(i)) != -1) {
testres = false;

}
}

if (testres == false) {
Xrm.Page.getControl("new_websiteurl").setNotification("Website formate should be in correct format");

}
else {
Xrm.Page.getControl("new_websiteurl").clearNotification();
}

}

Plz let me know if any changes required coz it is throwing error for correct format also.