Get WebSite Root Relative Path by JavaScript

Introduction

In this tip, I will define a JavaScript function that finds the website name and its root Virtual Folder to be ready if we want to run an HTML page which resides on the root folder of the website.

The problem starts when we are in a webform or HTML page in a subfolder in the website and we don't know how many folders are above the containing folder to set the property src to the correct root path in the website. Now we have no need to use the '../' to move up one level since we exactly know the root path.

Background

You need to know:

• HTML
• JavaScript

Using the Code

Just put the following JavaScript function which will return the full root path of a website also including the IIS Express port if found.

function getRootWebSitePath()
{
    var _location = document.location.toString();
    var applicationNameIndex = _location.indexOf('/', _location.indexOf('://') + 3);
    var applicationName = _location.substring(0, applicationNameIndex) + '/';
    var webFolderIndex = _location.indexOf('/', _
    location.indexOf(applicationName) + applicationName.length);
    var webFolderFullPath = _location.substring(0, webFolderIndex);

    return webFolderFullPath;
}