how can i validate a url in javascript using regular expression

Question

i want to validate a textbox who have some url value like blogs address or site adress how can i validate this textbox in js

Answer 1

var regExpUrl = new RegExp( "^((http|https|ftp)\://){1}([a-zA-Z0-9\.\-]+\.(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\'\\\+&%\$#\=~_\-]+))*$");

var inputArrs = [
	"http://190.190.1.190:8080",
	"https://190.190.1.190:8080",
	"http://190.190.1.190:8080/",
	"http://190.190.1.190:8080/xampp/",
	"http://190.190.1.190:8080/testproject",
	"http://190.190.1.190:8080/testproject/admin/index.php",
	"http://190.190.1.190:8080/testproject/admin/index.php?a=asdf&asdf",
	"http://190.190.1.190:8080/phpmyadmin",
	"http://www.google.com.au",
	"https://www.google.com.au/asdf/asdf/asdfasdf?asdf=asdf&asdf=asdf",
	"http://google.com.au",
	"https://google.com.au",
	"www.google.com.au",
	"google.com.au",
	"http://www.google.com.au",
	"test",
	"!@#!@#!@#",
	"123",
	"210.110",
	"y.y.y.y",
	"255.0.0.y",
	"666.10.10.20",
	"4444.11.11.11",
	"33.3333.33.3",
	"190.190.1.190",
	"190.190.1.190",
	"190.190.1.190:80",
	"190.190.1.190:8080",
	"190.190.1.190:",
	
];

inputArrs.forEach(function(input) {
	if(regExpUrl.test(input)) {
		res = "URL/IP Valid";
	} else {
		res = "Invalid URL/IP";
	}
	prevVal = document.getElementById("response").innerHTML;
    document.getElementById("response").innerHTML = prevVal + "
" + input + " = " + res + "
";
});