function fillCategory(){ 
 // this function is used to fill the category list on load
addOption(document.drop_list.Category, "Pro Flight", "Pro Flight", "");
addOption(document.drop_list.Category, "Cyborg", "Cyborg", "");
addOption(document.drop_list.Category, "Joysticks", "Joysticks", "");
addOption(document.drop_list.Category, "Gamepads", "Gamepads", "");
addOption(document.drop_list.Category, "Wheels", "Wheels", "");
addOption(document.drop_list.Category, "Mice", "Mice", "");
addOption(document.drop_list.Category, "Keyboards", "Keyboards", "");
addOption(document.drop_list.Category, "PC Accessories", "PC Accessories", "");
addOption(document.drop_list.Category, "PC Speakers", "PC Speakers", "");
}

function SelectSubCat(){
// ON selection of category this function will work

removeAllOptions(document.drop_list.SubCat);
addOption(document.drop_list.SubCat, "", "SubCat", "");

if(document.drop_list.Category.value == 'Pro Flight'){
addOption(document.drop_list.SubCat,"X52 Pro Flight Controller", "Flight Controller");
addOption(document.drop_list.SubCat,"Pro Flight Rudder Pedals", "Pro Flight Rudder Pedals");
addOption(document.drop_list.SubCat,"Pro Flight Yoke System", "Pro Flight Yoke System");
addOption(document.drop_list.SubCat,"Pro Flight Quadrant Throttle", "Pro Flight Quadrant Throttle");
}
if(document.drop_list.Category.value == 'Cyborg'){
addOption(document.drop_list.SubCat,"Cyborg Rumble Pad", "Cyborg Rumble Pad");
addOption(document.drop_list.SubCat,"Cyborg 5.1 Headset", "Cyborg 5.1 Headset");
}
if(document.drop_list.Category.value == 'Joysticks'){
addOption(document.drop_list.SubCat,"X52", "X52");
addOption(document.drop_list.SubCat,"Cyborg evo Force Feedback", "Cyborg evo Force Feedback");
addOption(document.drop_list.SubCat,"Cyborg evo Wireless", "Cyborg evo Wireless");
addOption(document.drop_list.SubCat,"Cyborg evo", "Cyborg evo");
addOption(document.drop_list.SubCat,"Aviator", "Aviator");
addOption(document.drop_list.SubCat,"ST290 Pro", "ST290 Pro");
addOption(document.drop_list.SubCat,"ST90", "ST90");
}
if(document.drop_list.Category.value == 'Gamepads'){
addOption(document.drop_list.SubCat,"P3200", "P3200");
addOption(document.drop_list.SubCat,"P3000", "P3000");
addOption(document.drop_list.SubCat,"P2900", "P2900");
addOption(document.drop_list.SubCat,"P2600", "P2600");
addOption(document.drop_list.SubCat,"P2500", "P2500");
addOption(document.drop_list.SubCat,"P990", "P990");
addOption(document.drop_list.SubCat,"P880", "P880");
addOption(document.drop_list.SubCat,"P580", "P580");
addOption(document.drop_list.SubCat,"P480", "P480");
addOption(document.drop_list.SubCat,"P380", "P380");
}
if(document.drop_list.Category.value == 'Wheels'){
addOption(document.drop_list.SubCat,"R440 Force Feedback", "R440 Force Feedback");
addOption(document.drop_list.SubCat,"R220 Digital", "R220 Digital");
}
if(document.drop_list.Category.value == 'Mice'){
addOption(document.drop_list.SubCat,"Notebook Optical Mouse", "Notebook Optical Mouse");
addOption(document.drop_list.SubCat,"Desktop Optical Mouse", "Desktop Optical Mouse");
addOption(document.drop_list.SubCat,"Obsidian Wireless Mouse", "Obsidian Wireless Mouse");
addOption(document.drop_list.SubCat,"Wireless Optical Mouse", "Wireless Optical Mouse");
addOption(document.drop_list.SubCat,"Optical Mouse Comfort Pro", "Optical Mouse Comfort Pro");
addOption(document.drop_list.SubCat,"Optical 7 Button Mouse", "Optical 7 Button Mouse");
addOption(document.drop_list.SubCat,"Laser Mouse", "Laser Mouse");
addOption(document.drop_list.SubCat,"'Notebook Laser Mouse", "'Notebook Laser Mouse");
}
if(document.drop_list.Category.value == 'Keyboards'){
addOption(document.drop_list.SubCat,"Eclipse II", "Eclipse II");
addOption(document.drop_list.SubCat,"Eclipse", "Eclipse");
addOption(document.drop_list.SubCat,"Gamers Keyboard", "Gamers Keyboard");
addOption(document.drop_list.SubCat,"Slimline Multimedia keyboard", "Slimline Multimedia keyboard");
addOption(document.drop_list.SubCat,"Slimline Aluminium Keyboard", "Slimline Aluminium Keyboard");
addOption(document.drop_list.SubCat,"Multimedia Combo Keyboard", "Multimedia Combo Keyboard");
}
if(document.drop_list.Category.value == 'PC Accessories'){
addOption(document.drop_list.SubCat,"Mini UFO USB Hub", "Mini UFO USB Hub");
addOption(document.drop_list.SubCat,"GH20 Vibration Headset", "GH20 Vibration Headset");
addOption(document.drop_list.SubCat,"GH50 SRS Headset", "GH50 SRS Headset");
addOption(document.drop_list.SubCat,"Laptop Kit", "Laptop Kit");
addOption(document.drop_list.SubCat,"Multimedia Presenter", "Multimedia Presenter");
}
if(document.drop_list.Category.value == 'PC Speakers'){
addOption(document.drop_list.SubCat,"A-250", "A-250");
addOption(document.drop_list.SubCat,"A-200", "A-200");
addOption(document.drop_list.SubCat,"3D-210", "3D-210");
addOption(document.drop_list.SubCat,"3D-360", "3D-360");
addOption(document.drop_list.SubCat,"3D-570", "3D-570");
}

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

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);
}