var descTitle = new Array();
var descText = new Array();
var info = null;
var invalid = "Click the download button below.";

function loadAdminOptions(){

	info = new DynamicOptionList("infotype", "category");
	
	info.selectFirstOption = false;

	for(var i = 0; i < 7; i++){
		descTitle[i] = document.getElementById("title"+i);
		descText[i] = document.getElementById("desc"+i);
 	}

    info.forValue("potential_natural_vegetation").addOptionsTextValue(
    	"Tropical Evergreen Forest/Woodland", "veg1",
    	"Tropical Deciduous Forest/Woodland", "veg2",
    	"Temperate Broadleaf Evergreen Forest/Woodland", "veg3",
    	"Temperate Needleleaf Evergreen Forest/Woodland", "veg4",
    	"Temperate Deciduous Forest/Woodland", "veg5", 
    	"Boreal Evergreen Forest/Woodland", "veg6",
    	"Boreal Deciduous Forest/Woodland", "veg7",
    	"Evergreen/Deciduous Mixed Forest", "veg8",
    	"Savanna", "veg9",
    	"Grassland/Steppe", "veg10",
    	"Dense Shrubland", "veg11",
    	"Open Shrubland", "veg12",
    	"Tundra", "veg13",
    	"Desert", "veg14",
    	"Polar Desert/Rock/Ice", "veg15" );
    	
    info.forValue("hisland").addOptionsTextValue(
    	"Cropland", "cropland",
    	"Forestland", "forest",
		"Savanna/Grassland", "savgr",
		"Shrubland" , "shrub",
		"Other land", "otherland");

    info.forValue("curland").addOptionsTextValue(
    	"Cropland", "cropland1992",
    	"Forestland", "forest1992",
    	"Savanna/Grassland", "savgr1992",
    	"Shrubland", "shrub1992",
    	"Grazing land", "pasture1992",
    	"Built-up land", "urban1992",
    	"Other land", "otherland1992");

    info.forValue("majorcrops").addOptionsTextValue(
    	"Barley", "barley1992",
    	"Cassava","cassava1992",
		"Cotton", "cotton1992",
		"Groundnuts/Peanuts", "grnuts1992",
		"Maize", "maize1992",
		"Millet", "millet1992", 
		"Oil Palm", "oilpalm1992",
		"Other Crops", "othercrops1992",
		"Potato", "potat1992",
		"Pulses", "pulses1992",
		"Rapeseed/Canola", "rape1992",
		"Rice", "rice1992",
		"Rye", "rye1992",
		"Sorghum", "sorghum1992",
		"Soybeans", "soy1992",
		"Sugarbeet", "sugarb1992",
		"Sugarcane", "sugarc1992",
		"Sunflower", "sunfl1992",
		"Wheat", "wheat1992");

	info.forValue("population").addOptionsTextValue(
		invalid, "invalid" );

	info.forValue("land_area").addOptionsTextValue(
		invalid, "invalid" );

	info.forValue("landsuit").addOptionsTextValue(
		invalid, "invalid" );
}

function loadGridOptions(){	

	info = new DynamicOptionList("grid_lev_1", "grid_lev_2");
	
	for(var i = 0; i < 6; i++){
		descTitle[i] = document.getElementById("title"+i);
		descText[i] = document.getElementById("desc"+i);
 	}

	info.selectFirstOption = false;
	
	info.forValue("pop_den").addOptionsTextValue(
		"1990", "1990",
		"1995", "1995" );
	
	info.forValue("land_area").addOptionsTextValue(
		invalid, "invalid" );
	
	info.forValue("hist_crp_lnd").addOptionsTextValue(
		"1700", "1700",
		"1710", "1710",
		"1720", "1720",
		"1730", "1730",
		"1740", "1740",
		"1750", "1750",
		"1760", "1760",
		"1770", "1770",
		"1780", "1780",
		"1790", "1790",
		"1800", "1800",
		"1810", "1810",
		"1820", "1820",
		"1830", "1830",
		"1840", "1840",
		"1850", "1850",
		"1860", "1860",
		"1870", "1870",
		"1880", "1880",
		"1890", "1890",
		"1900", "1900",
		"1910", "1910",
		"1920", "1920",
		"1930", "1930",
		"1940", "1940",
		"1950", "1950",
		"1960", "1960",
		"1970", "1970",
		"1980", "1980",
		"1990", "1990",
		"1992", "1992" );
	
	info.forValue("land_cvr").addOptionsTextValue(
		"Cropland", "cropland",
		"Pasture", "pasture",
		"Built-Up", "built_up" );
	
	info.forValue("major_crps").addOptionsTextValue(
		"Barley", "barley",
		"Cassava", "cassava",
		"Cotton", "cotton",
		"Groundnuts/Peanuts", "grnuts",
		"Maize", "maize",
		"Millet", "millet",
		"Oil Palm", "oilpalm",
		"Other Crops", "othercrops",
		"Potato", "potato",
		"Pulses", "pulses",
		"Rapeseed/Canola", "rape",
		"Rice", "rice",
		"Rye", "rye",
		"Sorghum", "sorghum",
		"Soybeans", "soy",
		"Sugarbeet", "sugarbeet",
		"Sugarcane", "sugarcane",
		"Sunflower", "sunflower",
		"Wheat", "wheat" );
	
	info.forValue("land_suit").addOptionsTextValue(
		invalid, "invalid" );
}

function changeText(index) {

	var t = document.getElementById("title");
	var d = document.getElementById("desc");

	while (t.hasChildNodes()) {
		var c = t.childNodes[0];
		t.removeChild(c);
	}

	while (d.hasChildNodes()) {
		var c = d.childNodes[0];
		d.removeChild(c);
	}

	t.appendChild (descTitle[index]);
	d.appendChild (descText[index]);
}