Variable problem: Unexpected identifier

This is my code:

function show_btn(){
    var actualproject2 = new String('String');
    actualproject2 = <?php echo $_SESSION["actualproject"]; ?> ;
$.ajax({
  method:"POST",
  url: '/wp-content/themes/ne4/PJson.php',
  data:  {
    "getCanvas":1,
    "whichProject":actualproject2,
    },
    datatype: "text",
    success: function(strdate){
   console.log(strdate);
     }
 });
}

Uncaught SyntaxError: Unexpected identifier

In debugger I may see:

function show_btn(){
    var actualproject2 = new String('String');
    actualproject2 = First project;

I think the problem is blank space between "First" and "project", because it is also  underlined with red in debugger.
What correction must I perform to resolve this problem?
(i did try to solve it with:     var actualproject2 = new String('String');, but no success)