Javascript Tip: Detect Client Time Zone

Many times we just need to gather visitor's time zone information. Below is a short script the result of which could be stored in a cookie or a hidden field. Function returns client GMT offset hours. The advantages of using client script are the following: you eliminate proxy location issues and daylight saving issues.

function getTimeZone() 
{
    var rightNow = new Date();
    var date1 = new Date(rightNow.getFullYear(), 0, 1, 0, 0, 0, 0);
    var temp = date1.toGMTString();
    var date3 = new Date(temp.substring(0, temp.lastIndexOf(" ") -1));
    var hoursDiffStdTime = (date1 - date3) / (1000 * 60 * 60);
    return hoursDiffStdTime;
}

Enjoy :)

Related Posts:

• Javascript Tip: Add Item to Combobox Dynamically
• Javascript: Open Pop-Up at Center of Client Window
• Javascript: How To Set Cursor to Textbox End
• Javascript Tip: Catch Browser Closing Event
• Javascript: Remove Upper Chars from String
• Javascript: How To Change Browser Scrollbars Colors
• Javascript: How to Close Browser Window (window.close()) Without Warning
• HowTo Delete Cookie Using Javascript
• Javascript Tip: Adjust iframe Size to Fit its Contents
• Javascript: Convert RGB Color to HTML Hex