ทำไมพอเอา java script มารวมกับ php แล้วมันใช้ไม่ได้คะ?

<style type="text/css">      

/* css code สำหรับรูปแบบของภาพที่ต้องการแสดง */    
div.bigGallPic{     
    position:fixed;     
    margin:auto;     
    top:50px;     
    left:150px;     
    padding:3px;     
    text-align:center;     
    background-color:#FFFFFF;     
    border:5px solid #666666;     
    display:none;     
    cursor:pointer;    
}     
</style>   

<script type="text/javascript">      
function setPic(imgShow){     
    var showBig=document.getElementById('bigGallDiv');     
    showBig.style.display='block';            
    showBig.style.visibility='hidden';     
    showBig.innerHTML="<img src='"+imgShow+"' title='คลิกที่รูปเืพื่อปิด' width='800' height='600'>";     
    setTimeout("showPic()",500);  
}   
function  showPic(){  
    var showBig=document.getElementById('bigGallDiv');     
    var LeftVal=0;        
    if(showBig.innerHTML!=""){     
        LeftVal=showBig.offsetWidth;                          
        LeftVal=(gWH().width-LeftVal)/2;      
    }     
    showBig.style.left=LeftVal+"px";     
    showBig.style.visibility='visible';       
}  
function gWH(){ // ฟังก์ชันหาความกว้างและความสูงของหน้าเพจ     
    var e = window, a = 'inner';     
    if ( !( 'innerWidth' in window ) ){     
        a = 'client';     
        e = document.documentElement || document.body;     
    }     
    return { width : e[ a+'Width' ] , height : e[ a+'Height' ] }     
}    
</script> 

  $dir=opendir("EVENT/stargrandsale/looktung/");
  $file="";
  print"<link rel='stylesheet' href='script/photo_gal.css' type='text/css'/>";
  while(($file=readdir($dir))==true){
    //<!--แถว 1-->
  print"<div id='photo_tab1'>";
    print"<div id='photo_gal'>";
      print"<div class='bigGallPic' id='bigGallDiv' onclick=\"this.style.display='none'\"></div>";    
      print"<a href=\"javascript:setPic('EVENT/stargrandsale/looktung/".$file."\");'><img src='EVENT/stargrandsale/looktung/".$file."' width='100px' height='100px'/></a>";  
    print"</div>";
  print"</div>";
  }
  closedir($dir);