OK, it is a little more complicated than that I am echoing a line via php that contains the following:

 
onmouseover = UpdateTemplates('$row[1]')

It works fine unless of course if there are spaces in the $row[1] result.

How can I escape the spaces?

Do you want to escape the spaces or remove them completely?

Either way, I believe the cleanest method would be to use a regular expression to do a search and replace.

Use the correct format for attribute values.

onmouseover="UpdateTemplates('$row[1]')"