php - How to tell a page to load a JS function based on variables being sent -

I have a function that loads some content when executed ...

IE ..

  function load_product (product_id) {$ .ajax ({type: 'GET', url: 'product_image.php', data: 'product_id =' + product_id + '', success : Function (data) {$ ('# Product_image') .html (data);}}); }   
 It works great but says I want to create a link to a page, so that some dynamic content trigger to load?  
 IE I link to a page, say  
  www .blah.com /? Product = 1   
 and some 'divs' on the page that dynamically loads various things for product # 1.  
 The way I am currently doing something:  
    
 And I said that somewhere new page is loading. It works. But is there a better way?   
 
 
 I do something similar but I am using it.  
  & lt; Script & gt; Var isProduct = & lt ;? Php echo release ($ _ [request ['product'])? 'True': 'False'? & Gt; Yoppop ({test: isproduct, yes: 'js_file_to_load.js',}); & Lt; / Script & gt;   
 Then you can store all JS in an external file. There is additional benefit on your method in this, I do not need to load external scripts for each request when  $ _ REQUEST ['product']  is set.