I have a textbox where the user can enter URL and button named Check link. On clicking button, a new window should be opened with the URL entered by the user. If i enter URL as "http://google.com" then window.open('http://google.com'); is working fine but if i enter "www.google.com" then it is appending to the current window url (http://localhost:1234www.google.com) which is not a valid url. How to make this work?
Thanks in advance
Check & prepend
if (!/^(http:|https:)/i.test(url))
url = "http://" + url;
try this:
function f(url) {
if (url.indexOf("http://") == -1) {
url = "http://" + url;
}
window.open(url);
}
If your question is "How do I test if a string starts with 'http://' and if not prepend it?" then something like this:
var url = "somestring.com"; // as set from your textbox
if (0 != url.toLowerCase().indexOf("http"))
url = "http://" + url;
It would be wise to trim leading and trailing spaces before doing this test, but I'll leave that as an exercise for the reader...
Add a onclick button function and handle the text in that.
function checkLink() {
var url = document.getElementById("textbox-id").value;
if(url.substr(0,7) != "http://") {
alert("Invalid URL! Please make it like http://myurl.com");
return false;
}
}
