mAry = new Array("January","February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");

var sMonth = document.all.hmonth.value;
var nMonth = parseInt(document.all.hmonth.value);
monthName = mAry[nMonth - 1];

var sYear = document.all.hyear.value;
var nYear = parseInt(document.all.hyear.value);

docName = nYear + '_' + sMonth + '_SPFF_Newsletter.pdf'; 
docTag = '<a href';
docPath = '="/Portals/6/Newsletters/Newsletter' + sYear + '/' + docName;

myText = 'The ' + monthName + ' Newsletter is now available for ' + docTag +  docPath  + '" target=_blank>Download</a>';
document.write (myText);