php - javascript together prob?

Anyone have an idea of how to get this to work? Its the onClick part that wont work. I know if I pull it out of PHP it works just fine but I need it part of the script as I have a loop that it runs under. echo ("<td width=50%><a href='' onClick='javascript:window.open (v_images/dsp_img_viewer.php?$image_loc, imageView, height=350,width=450, toolbar=no, menubar=no, scrollbars=yes, resizable=yes,location=no, directories=no,status=no);'>"); I considered and tried sending it to a js function but it doesn't like not having the " but I need the quotes in the echo statement to read in the variables passed to it. thanks