window.open problem

[markivs]

I have a link in my page. When the user clicks on it, it is supposed to open a pdf file in a new window. But I am having issues with it. I am using IE6.0

This works:
<a href="http://blah:8088/buy/common/pdfdata.pdf?page=0&amp;GroupName=BuyList" target="somepage">pdf</a>

This dose not:
<a href="javascript:testFunc('http://blah:8088/buy/common/pdfdata.pdf?page=0&amp;GroupName=BuyList');">pdf</a>

function testFunc(url) {
window.open(url,'somepage');
}

So when I click on the link, a new IE window opens up and immediately a message window opens and asks if I want to open or save the file. Clicking on save or open buttons dosen't do any good. For some reason IE thinks I am trying to download the pdf.

Any idea why ? Your help will be appreciated.

Thanks.
Mark