doJavaScript - JSTalk browser

doJavaScript.jstalk

/**
 * Execute JavaScript in the browser
 * 
 * @param    {string}  js JavaScript string
 * @required {object}  browsername the browser name
 * @required {object}  browser the reference to the browser
 * @required {object}  tab the reference to the active tab
 * @return   {mixed}   return value from JavaScript
 */
function doJavaScript( js )
{
    result = '';

    if( browsername === "Safari" || browsername === "WebKit" )
    {
        result = browser.doJavaScript_in( js, tab );
    }
    else if( browsername === "Google Chrome" )
    {
        result = tab.executeJavascript( js );
    }
    
    return result;
}