javascriptで関数の引数に変数を渡したい

お世話になっております。

画像ボタンを押したらonClickが呼ばれてJavascriptの関数を呼び出しているのですが
PHP側での変数をそのJavascript側での関数の引数にPHPの変数を渡したいのですがうまくいきません

javascript
1        function LinkClick(param,extension) {
2            var element = document.getElementById("Image01");
3
4            switch (param) {
5                case 0:
6
7
8                   
9                    element.src = `../wounise/gamelist/${Id}/img/${Exp_Image1_Path}`;
10                    break;
11                case 1:
12                    element.src = `../wounise/gamelist/${Id}/img/${Exp_Image2_Path}`;
13                    break;
14                case 2:
15                    element.src = `../wounise/gamelist/${Id}/img/${Exp_Image3_Path}`;
16                    break;
17                case 3:
18                    element.src = `../wounise/gamelist/${Id}/img/${Exp_Image4_Path}`;
19                    break;
20                case 4:
21                    element.src = `../wounise/gamelist/${Id}/img/${Exp_Image5_Path}`;
22                    break;
23                default:
24                    element.src = `../wounise/gamelist/${Id}/img/${Exp_Image6_Path}`;
25                    break;
26            }
27        }
28    </script>
29
30
31
32
33 <!-- For image list array -->
34
35<?php
36
37
38$EOM = <<<EOM
39
40<img id="Image01" class="MainImage1" src="../wounise/gamelist/$Id/img/$Exp_Image1" >
41<br/>
42   <a href="javascript:void(0);" onclick="LinkClick(0,$Exp_Image1);"><img class="SecondImage1" id="SecondImage1" src="../wounise/gamelist/$Id/img/$Exp_Image1"></img>
43    </a><br/>
44    <a href="javascript:void(0);" onclick="LinkClick(1,$Exp_Image2);"><img class="SecondImage1" id="SecondImage1" src="../wounise/gamelist/$Id/img/$Exp_Image2"></img>
45    </a><br/>
46    <a href="javascript:void(0);" onclick="LinkClick(2,$Exp_Image3);"><img class="SecondImage1" id="SecondImage1" src="../wounise/gamelist/$Id/img/$Exp_Image3"></img>
47     </a><br/>
48   <a href="javascript:void(0);" onclick="LinkClick(5,$Exp_Image4);"><img class="SecondImage1" id="SecondImage1" src="../wounise/gamelist/$Id/img/$Exp_Image4"></img>
49     </a><br/>
50    <a href="javascript:void(0);" onclick="LinkClick(4,$Exp_Image5);"><img class="SecondImage1" id="SecondImage1" src="../wounise/gamelist/$Id/img/$Exp_Image5"></img>
51     </a><br/>
52    <a href="javascript:void(0);" onclick="LinkClick(5,$Exp_Image6);"><img class="SecondImage1" id="SecondImage1" src="../wounise/gamelist/$Id/img/$Exp_Image6"></img>
53    </a><br/>
54EOM;
55
56echo $EOM;
57
58?>