Printing a document
Another question I see asked a lot on the forums is I want to print a document without loading it. The problem is you have to load the document. The way to hide it from the user is to use a hidden iframe which you load the document.

<iframe id="iframePDF" src="about:blank" style="display:none"></iframe>
<input type="button" value="Print Word" name="btnPrint1" onclick="PrintFrame('test.doc')"/>
<input type="button" value="Print Excel" name="btnPrint2" onclick="PrintFrame('asdf.CSV')"/>
<input type="button" value="Print PDF" name="btnPrint3" onclick="PrintFrame('test.pdf')"/>
<span id="spanMess" style="display:none;color:red;"><h3>Preparing Document For Print</h3></span>

<script type="text/javascript">
  function PrintFrame(xFile){
    parent.iframePDF.location.href = xFile;
    document.getElementById("spanMess").style.display="block";
    parent.iframePDF.onload = new function(){
      setTimeout("parent.iframePDF.print();
      parent.document.getElementById('spanMess').style.display='none';",5000);
    }
  }
</script>

Was my pop up blocked?
I have seen a lot of questions lately about detecting if your pop up window was blocked by a pop up blocker. It is rather simple as shown below:

var winPop = window.open(...) ;
if (winPop==null || typeof(winPop)=="undefined") alert("window blocked");