function SelectSubCat(formNbr,material,color){
// ON selection of category this function will work

removeAllOptions(document.forms[formNbr].elements[color]);
addOption(document.forms[formNbr].elements[color], "", "- please select -", "");

if(document.forms[formNbr].elements[material].value == 'PC'){
addOption(document.forms[formNbr].elements[color],"White", "White");
}
if(document.forms[formNbr].elements[material].value == 'PC ABS'){
addOption(document.forms[formNbr].elements[color],"Black", "Black");
}
if(document.forms[formNbr].elements[material].value == 'ABS M30'){
addOption(document.forms[formNbr].elements[color],"Natural", "Natural");
//addOption(document.forms[formNbr].elements[color],"White", "White");
//addOption(document.forms[formNbr].elements[color],"Black", "Black");
//addOption(document.forms[formNbr].elements[color],"Dark Gray", "Dark Gray");
//addOption(document.forms[formNbr].elements[color],"Blue", "Blue");
//addOption(document.forms[formNbr].elements[color],"Red", "Red");
}
if(document.forms[formNbr].elements[material].value == 'FullCure 720'){
addOption(document.forms[formNbr].elements[color],"Transparent", "Transparent");
}
if(document.forms[formNbr].elements[material].value == 'FullCure Vero'){
addOption(document.forms[formNbr].elements[color],"White", "White");
addOption(document.forms[formNbr].elements[color],"Blue", "Blue");
addOption(document.forms[formNbr].elements[color],"Black", "Black");
}
if(document.forms[formNbr].elements[material].value == 'FullCure Tango'){
addOption(document.forms[formNbr].elements[color],"Gray", "Gray");
addOption(document.forms[formNbr].elements[color],"Black", "Black");
}
if(document.forms[formNbr].elements[material].value == 'FullCure Tango Plus'){
addOption(document.forms[formNbr].elements[color],"Transparent", "Transparent");
//addOption(document.forms[formNbr].elements[color],"Gray", "Gray");
//addOption(document.forms[formNbr].elements[color],"Black", "Black");
}

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

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);
}