how to write two ampersand for javascript in wordpress?

I use wordpress 3.0.1 and install Exec-PHP plungin.
I edit the code in admin panel- pages - html cede. I want to add some javascript in a custom page. when the code use two ampersand. it occupy wrong. `& &` become `& # 0 3 8 ; & # 0 3 8 ;`(the original code has no space) How to solve this problem? thanks.

for(i=0;i<3;i++)
{
   var l=a.length;
   //alert(l);
   var iNum=parseInt(Math.random()*l);
   //alert(iNum);
  
   b[i]=a[iNum];
   if(iNum==0&amp;&amp;iNum+1!=l){a.shift();}else if(iNum+1==l){a.pop()}else{a.splice(iNum,1)}
   //alert(b[i]);
   document.write(b[i]);
}

HTML:

 

I have solved this problem, there should be write the code in a .js file.