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

function SelectSubCat_powstrip(){
// ON selection of Panels this function will work

removeAllOptions(document.drop_list_powstrip.SubCat_powstrip);
removeAllOptions(document.drop_list_powstrip.Tier3_powstrip);
addOption(document.drop_list_powstrip.SubCat_powstrip, "", "Make a Selection", "");

if(document.drop_list_powstrip.Strips.value == 'singlecircuit'){
addOption(document.drop_list_powstrip.SubCat_powstrip,"ftaCorded4", "15A Corded");
addOption(document.drop_list_powstrip.SubCat_powstrip,"twaCorded4", "20A Corded");
addOption(document.drop_list_powstrip.SubCat_powstrip,"ftaHard4", "15A Hardwired");
addOption(document.drop_list_powstrip.SubCat_powstrip,"twaHard4", "20A Hardwired");
}
if(document.drop_list_powstrip.Strips.value == 'multicircuit'){
addOption(document.drop_list_powstrip.SubCat_powstrip,"ftaHard5", "15A Hardwired");
addOption(document.drop_list_powstrip.SubCat_powstrip,"twaHard5", "20A Hardwired");
}
if(document.drop_list_powstrip.Strips.value == 'remotesingle'){
addOption(document.drop_list_powstrip.SubCat_powstrip,"twaCorded6", "20A Corded");
addOption(document.drop_list_powstrip.SubCat_powstrip,"twaHard6", "20A Hardwired");
}
if(document.drop_list_powstrip.Strips.value == 'remotemulti'){
addOption(document.drop_list_powstrip.SubCat_powstrip,"twaHard7", "20A Hardwired");
}
if(document.drop_list_powstrip.Strips.value == 'modpower'){
addOption(document.drop_list_powstrip.SubCat_powstrip,"", "No further options");
}
}
////////////////// 
function SelectTier3_powstrip(){
removeAllOptions(document.drop_list_powstrip.Tier3_powstrip);
addOption(document.drop_list_powstrip.Tier3_powstrip, "", "Make a Selection", "");

if(document.drop_list_powstrip.SubCat_powstrip.value == 'ftaCorded4'){
addOption(document.drop_list_powstrip.Tier3_powstrip,"Standard8", "Standard");
addOption(document.drop_list_powstrip.Tier3_powstrip,"Surge8", "Surge Suppression");
}
if(document.drop_list_powstrip.SubCat_powstrip.value == 'twaCorded4'){
addOption(document.drop_list_powstrip.Tier3_powstrip,"Surge9", "Surge Suppression");
}
if(document.drop_list_powstrip.SubCat_powstrip.value == 'ftaHard4'){
addOption(document.drop_list_powstrip.Tier3_powstrip,"Standard10", "Standard");
}
if(document.drop_list_powstrip.SubCat_powstrip.value == 'twaHard4'){
addOption(document.drop_list_powstrip.Tier3_powstrip,"Standard11", "Standard");
addOption(document.drop_list_powstrip.Tier3_powstrip,"Surge11", "Surge Suppression"); 
}
if(document.drop_list_powstrip.SubCat_powstrip.value == 'ftaHard5'){
addOption(document.drop_list_powstrip.Tier3_powstrip,"Standard12", "Standard");
}
if(document.drop_list_powstrip.SubCat_powstrip.value == 'twaHard5'){
addOption(document.drop_list_powstrip.Tier3_powstrip,"Standard13", "Standard");
}
if(document.drop_list_powstrip.SubCat_powstrip.value == 'twaCorded6'){
addOption(document.drop_list_powstrip.Tier3_powstrip,"Standard14", "Standard");
}
if(document.drop_list_powstrip.SubCat_powstrip.value == 'twaHard6'){
addOption(document.drop_list_powstrip.Tier3_powstrip,"Standard15", "Standard");
}
if(document.drop_list_powstrip.SubCat_powstrip.value == 'twaHard7'){
addOption(document.drop_list_powstrip.Tier3_powstrip,"Standard16", "Standard");
}

}
/////////////////


/////////////////
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);
}