var perform_acrobat_detection = function()
{ 
    // The returned object
    var browser_info = {
        name: null,
        acrobat : null,
        acrobat_ver : null
    };
  
    if(navigator && (navigator.userAgent.toLowerCase()).indexOf("chrome") > -1) browser_info.name = "chrome";
    else if(navigator && (navigator.userAgent.toLowerCase()).indexOf("msie") > -1) browser_info.name = "ie";
    else if(navigator && (navigator.userAgent.toLowerCase()).indexOf("firefox") > -1) browser_info.name = "firefox";
    else if(navigator && (navigator.userAgent.toLowerCase()).indexOf("msie") > -1) browser_info.name = "other";
	
    try {
        if(browser_info.name == 'ie') {
            var control = null;
            // load the activeX control.
            try {
                // AcroPDF.PDF is used by version 7 and later.
                control = new ActiveXObject('AcroPDF.PDF');
            } catch(e) {}
            if(!control) {
                try {
                    // PDF.PdfCtrl is used by version 6 and earlier.
                    control = new ActiveXObject('PDF.PdfCtrl');
                } catch(e) {}
            }
            if(!control) {
                browser_info.acrobat == null;
                return browser_info;
            }
   
            version = control.GetVersions().split(',');
            version = version[0].split('=');
            browser_info.acrobat = 'installed';
            browser_info.acrobat_ver = parseFloat(version[1]);
        } else if(browser_info.name == 'chrome') {
            for(key in navigator.plugins) {
                if(navigator.plugins[key].name == 'Chrome PDF Viewer' || navigator.plugins[key].name == 'Adobe Acrobat') {
                    browser_info.acrobat = 'installed';
                    browser_info.acrobat_ver = parseInt(navigator.plugins[key].version) || 'Chrome PDF Viewer';
                }
            }
        } else if(navigator.plugins != null) {
            var acrobat = navigator.plugins['Adobe Acrobat'];
            if(acrobat == null) {
                browser_info.acrobat = null;
                return browser_info;
            }
            browser_info.acrobat = 'installed';
            browser_info.acrobat_ver = acrobat.version;
            if(browser_info.acrobat_ver == null) {
                browser_info.acrobat_ver = acrobat.description.substring(acrobat.description.indexOf('Netscape') + 9, acrobat.description.length);
            }
        }
    } catch(e) {
        browser_info.acrobat_ver = null;
    }
    return browser_info;
}