Validating URL address

[nikon]

I want to validate my textbox for website url using javascript. Please give me code or code snippet for it so I can use it. Is there any other way to validate it than the javascript?

Please advice.

[mburt]

Validation should not be done with Javascript because a user can disable Javascript if he or she wants to - validation should be processed server-side.

However it is possible to do so with Javascript.

var input = document.getElementById("myfield");
var url_match = /https?:\/\/([-\w\.]+)+(:\d+)?(\/([\w/_\.]*(\?\S+)?)?)?/;
var result = url_match.test(input);

The variable "result" either shows true or false, whether the input source is a valid URL.

[Zoli]

I want to validate my textbox for website url using javascript. Please give me code or code snippet for it so I can use it. Is there any other way to validate it than the javascript?

Please advice.

function isValidURL(url){
    var RegExp = /^(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/;
    if(RegExp.test(url)){
        return true;
    }else{
        return false;
    }
}

source >> i could not insert it

If I were you I would get the function run at onblur event.

[mburt]

Just keep in mind that such things are better off being done server-side (like with PHP) because users can turn off Javascript if they want to.

[Kay]

Good point, mburt. I know my son uses NoScript for FireFox all the time. He's always on about how great it is.

[mburt]

Your son, does web design run in the family? haha thats awesome :P

[Zoli]

Of course, validating a post via server side language is crucial, but truning off the javascript is not so good idea in my opinion, because a lot of function of various websites will be blocked this way.
Regards
Zoli

[Avss]

there are many code.. one of them is....

function checkURL(value) {
var urlregex = new RegExp("^(http:\/\/www.|https:\/\/www.|ftp:\/\/www.|www.){1}([0-9A-Za-z]+\.)");
if(urlregex.test(value))
{
return(true);
}
return(false);
}

if above regular expression does not work then...

change the regx to " ^(http:\/\/www.|https:\/\/www.|ftp:\/\/www.|www.){1}[0-9A-Za-z\.\-]*\.[0-9A-Za-z\.\-]*$ "


try it..!!

[donald]

function isValidURL(url){
    var RegExp = /^(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/;
    if(RegExp.test(url)){
        return true;
    }else{
        return false;
    }
}

source >> i could not insert it

If I were you I would get the function run at onblur event.

thanks zoli.....
thanks for telling in a good and effective way.....
all doubts are cleared now......
thanks.....