function parse_qs () {

 // Build an empty URL structure in which we will store
 // the individual query values by key.
 var objURL = new Object();
  
  
 // Use the String::replace method to iterate over each
 // name-value pair in the query string. Location.search
 // gives us the query string (if it exists).
 window.location.search.replace(
     new RegExp( "([^?=&]+)(=([^&]*))?", "g" ),
      
     // For each matched query string pair, add that
     // pair to the URL struct using the pre-equals
     // value as the key.
     function( $0, $1, $2, $3 ){
        objURL[ $1 ] = $3;
     }
 );
 return objURL;

}