Linking To Function Script In Another Page

I have a website for tanning salon services. Salon A's page has links for 4 possible equipment choices - (diamond, platinum, gold, bronze levels) on the [I]Sunbeds page. Sunbeds page has 2 iFrames, top and bottom, that are changed by 4 functions - changediamond(), changebronze(), etc. based on the selection. I need to be able to click a link on the Salon page that will take me to the corresponding function on the Sunbeds page...

Here's what I have so far:
Salon A page
<a href="sunbeds.htm?javascript:changediamond()"><img src="images/nr_diam_sm2.jpg" alt="Diamond Level Sunbeds" /></a>
(thru)
<a href="sunbeds.htm?javascript:changebronze()"><img src="images/nr_brnz_sm2.jpg" alt="Bronze Level Sunbeds" /></a>

Sunbeds page
<SCRIPT language="JavaScript">
function changediamond() {
parent.FRAME1.location="sb_top_ct1.htm";
parent.FRAME2.location="sb_bot_ct1.htm";
}
(thru)
function changebronze()
{
parent.FRAME1.location="sb_top_ct4.htm";
parent.FRAME2.location="sb_bot_ct4.htm";
}
</script>
.
..
...
..
.
<a href="javascript:changediamond()"><img src="images/diamond_sm2.jpg" alt="Diamond Level Sunbeds" /></a>
(thru)
<a href="javascript:changebronze()"><img src="images/bronze_sm2.jpg" alt="Bronze Level Sunbeds" /></a>

The links take me to the correct page but not the function. Once I'm there I can select the functions and the iFrame change works great. I'm just at a loss for passing along the data string i.e., sunbeds.htm?javascript"changediamond()