// Adobe Acrobat Detection  v1.0
// http://www.dithered.com/javascript/acrobat_detect/index.html
// code by Chris Nott (chris@NOSPAMdithered.com - remove NOSPAM)


var acrobatVersion = 0;

function getAcrobatVersion() {
    var agent = navigator.userAgent.toLowerCase(); 

    // NS3+, Opera3+, IE5+ Mac (support plugin array):  check for Acrobat plugin in plugin array
    if (navigator.plugins != null && navigator.plugins.length > 0) {
	for (i=0; i < navigator.plugins.length; i++ ) {
	    var plugin = navigator.plugins[i];
	    if (plugin.name.indexOf("Adobe Acrobat") > -1) {
		acrobatVersion = parseFloat(plugin.description.substring(30));

		if ( isNaN( acrobatVersion ) ) {
		    acrobatVersion = parseFloat(plugin.description.substring(46));
		}
	    }
	}
    }

    // IE4+ Win32:  attempt to create an ActiveX object using VBScript
    else if (agent.indexOf("msie") != -1 && parseInt(navigator.appVersion) >= 4 && agent.indexOf("win")!=-1 && agent.indexOf("16bit")==-1) {
	acrobatVersion = getAcrobatVBVersion();
    }

    // Can't detect in all other cases
    else {
	acrobatVersion = acrobatVersion_DONTKNOW;
    }

    return acrobatVersion;
}

acrobatVersion_DONTKNOW = -1;