function fillClock(){ 
 // this function is used to fill the Clock list on load first is value, second is text 
addOption(document.drop_list_audClock.Clock, "Floor", "Floor Racks", "");
addOption(document.drop_list_audClock.Clock, "Seismic-certified", "Seismic-Certified RacksTM", "");
addOption(document.drop_list_audClock.Clock, "Vari-Rack", "Vari-Rack", "");
addOption(document.drop_list_audClock.Clock, "Portable", "Portable Racks", "");
addOption(document.drop_list_audClock.Clock, "Wall-Mount", "Wall-Mount Racks & Shelves", "");
addOption(document.drop_list_audClock.Clock, "Pull", "Pull & Turn Racks", "");
addOption(document.drop_list_audClock.Clock, "Credenza", "Credenza Racks", "");
addOption(document.drop_list_audClock.Clock, "Laminated", "Laminated Racks", "");
}

function SelectSubCat_audClock(){
// ON selection of loads this function will work

removeAllOptions(document.drop_list_audClock.SubCat_audClock);
removeAllOptions(document.drop_list_audClock.Tier3_audClock);
addOption(document.drop_list_audClock.SubCat_audClock, "", "Make a Selection", "");

if(document.drop_list_audClock.Clock.value == 'audio1T41'){
addOption(document.drop_list_audClock.SubCat_audClock,"audio2T120","Grilles");
addOption(document.drop_list_audClock.SubCat_audClock	,	"audio2T121"	,"	Backboxes	");
}
if(document.drop_list_audClock.Clock.value == 'audio1T42'){
addOption(document.drop_list_audClock.SubCat_audClock	,	"audio2T122"	,"	Grilles	");
addOption(document.drop_list_audClock.SubCat_audClock	,	"audio2T123"	,"	Backboxes	");
}
if(document.drop_list_audClock.Clock.value == 'audio1T43'){
addOption(document.drop_list_audClock.SubCat_audClock	,	"audio2T124"	,"	Grill Frame Options (custom)");
addOption(document.drop_list_audClock.SubCat_audClock	,	"audio2T125"	,"	Grille Options (replacement parts)");
addOption(document.drop_list_audClock.SubCat_audClock	,	"audio2T126"	,"	Backboxes	");
}
}
////////////////// 
function SelectTier3_audClock(){
removeAllOptions(document.drop_list_audClock.Tier3_audClock);
addOption(document.drop_list_audClock.Tier3_audClock, "", "Make a Selection", "");


if(document.drop_list_audClock.SubCat_audClock.value == 'audio2T120'){	
addOption(document.drop_list_audClock.Tier3_audClock	,"audio3T98","	Recessed	");
addOption(document.drop_list_audClock.Tier3_audClock	,"audio3T99","	Surface	");
}
if(document.drop_list_audClock.SubCat_audClock.value == 'audio2T121'){	
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T100","Recessed");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T101","Surface");
}
if(document.drop_list_audClock.SubCat_audClock.value == 'audio2T122'){	
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T102","Recessed/Surface");
}
if(document.drop_list_audClock.SubCat_audClock.value == 'audio2T123'){	
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T103","Recessed");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T104","Surface");
}
if(document.drop_list_audClock.SubCat_audClock.value == 'audio2T124'){	
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T105","Clock/Strobe Area");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T106","Handset Area");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T107","Speaker Area");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T108","Gang-Size Cutouts");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T109","Light Switch Cutouts");
}
if(document.drop_list_audClock.SubCat_audClock.value == 'audio2T125'){	
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T110","Clock/Strobe Area");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T111","Handset Area");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T112","Speaker Area");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T113","Gang-Size Cutouts");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T114","Light Switch Cutouts");
}
if(document.drop_list_audClock.SubCat_audClock.value == 'audio2T126'){	
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T115","Recessed");
addOption(document.drop_list_audClock.Tier3_audClock,"audio3T116","Surface");
}
}
/////////////////

/////////////////
function removeAllOptions(selectbox)
{
	var i;
	for(i=selectbox.options.length-1;i>=0;i--)
	{
		//selectbox.options.remove(i);
		selectbox.remove(i);
	}
}


function addOption(selectbox, value, text )
{
	var optn = document.createElement("OPTION");
	optn.text = text;
	optn.value = value;

	selectbox.options.add(optn);
}