var browserOK = false

function checkBrowser() {
  var verStr=navigator.appVersion, app=navigator.appName, version = parseFloat(verStr)

  if (app.indexOf('Netscape') != -1) {
    //  Netscape does not implement full CCS1 behaviors.
    //  if (version >= 4.0) browserOK = true
  } else if (app.indexOf('Microsoft') != -1) {
    if (version >= 4.0 || verStr.indexOf(4.0) != -1)
     browserOK = true
  }
}


var newAdobeReaderWindow

function launchAdobeReader() {

if (!newAdobeReaderWindow || newAdobeReaderWindow.closed) {
    // create the adobereader window
    newAdobeReaderWindow = window.open("http://www.adobe.com/products/acrobat/alternate.html","AdobeReader","status,menubar,scrollbars,resizable,width=500,height=350")

    // Create .opener property if necessary for old browsers.
    if (!newAdobeReaderWindow.opener) {
        newAdobeReaderWindow.opener = window
    }
} else {
    // window's already open; bring to front
    newAdobeReaderWindow.focus()
    }
}



function launchAdobeDocument(pdf_file) {
var newAdobeDocumentWindow
if (!newAdobeDocumentWindow || newAdobeDocumentWindow.closed) {
    // create the adobereader window
    newAdobeDocumentWindow = window.open(pdf_file,"AdobeDocument","status,menubar,scrollbars,resizable,width=700,height=600")

    // Create .opener property if necessary for old browsers.
    if (!newAdobeDocumentWindow.opener) {
        newAdobeDocumentWindow.opener = window
    }
} else {
	window.location = pdf_file;   
 // window's already open; bring to front
    newAdobeDocumentWindow.focus()
    }
}