SSL secure and non-secure items

[Access]

drByte is right that there must be a hard-coded link somewhere.

but it's not in your php or javascript files ... it's in your stylesheet's footer code
in your stylesheet.css i see:

.footer_c1 { width:567px; background:#FFFFFF url(http://www.diamondexchange.com.au/starlight/img/footer.png) left bottom;}
.footer_c2 { width:0px;}
.footer_c3 { width:207px; background:#FFFFFF url(http://www.diamondexchange.com.au/starlight/img/footer.png) right bottom;}

those direct links will most likely be what's causing your problem

Wow thankyou so much! Your a gentlemen.