var fromSize = 11;
var toSize = 3;
var multipliers = new Array(fromSize);
multipliers[0] = new Array(toSize); // measurement conversion arrays
multipliers[1] = new Array(toSize);
multipliers[2] = new Array(toSize);
multipliers[3] = new Array(1); // chemical conversion arrays
multipliers[4] = new Array(2);
multipliers[5] = new Array(1);
multipliers[6] = new Array(1);
multipliers[7] = new Array(2);
multipliers[8] = new Array(1);
multipliers[9] = new Array(1);
multipliers[10] = new Array(1);
multipliers[0][0] = 2240.0; // Tons, long
multipliers[0][1] = 1.0160;
multipliers[0][2] = 1.2000;
multipliers[1][0] = 2204.6; // Tonnes, Metric
multipliers[1][1] = 0.9842;
multipliers[1][2] = 1.1023;
multipliers[2][0] = 2000.0; // Tonnes, short
multipliers[2][1] = 0.8929;
multipliers[2][2] = 0.9072;
multipliers[3][0] = 1.2046; // K
multipliers[4][0] = 0.8302; // K2O
multipliers[4][1] = 1.6393;
multipliers[5][0] = 0.6100; // KCI Product
multipliers[6][0] = 2.2915; // P
multipliers[7][0] = 0.4364; // P2O5
multipliers[7][1] = 2.1852;
multipliers[8][0] = 0.4577; // BPL
multipliers[9][0] = 1.2159; // N
multipliers[10][0] = 0.8225; // NH3
function showConvertToOptions() {
var from = document.getElementById("convertFrom");
switch(from.value) {
case "0":
html = "";
document.getElementById("convertToHTML").innerHTML = html;
break;
case "1":
html = "";
document.getElementById("convertToHTML").innerHTML = html;
break;
case "2":
html = "\n";
document.getElementById("convertToHTML").innerHTML = html;
break;
case "3":
html = "\n";
document.getElementById("convertToHTML").innerHTML = html;
break;
case "4":
html = "\n";
document.getElementById("convertToHTML").innerHTML = html;
break;
case "5":
html = "\n";
document.getElementById("convertToHTML").innerHTML = html;
break;
case "6":
html = "\n";
document.getElementById("convertToHTML").innerHTML = html;
break;
case "7":
html = "\n";
document.getElementById("convertToHTML").innerHTML = html;
break;
case "8":
html = "\n";
document.getElementById("convertToHTML").innerHTML = html;
break;
case "9":
html = "\n";
document.getElementById("convertToHTML").innerHTML = html;
break;
case "10":
html = "\n";
document.getElementById("convertToHTML").innerHTML = html;
break;
}
document.getElementById("convertTo").disabled = true;
}
function unlockConvertTo() {
if((parseFloat(document.getElementById("amount").value)) && (parseFloat(document.getElementById("amount").value) != 0.0)) {
if(document.getElementById("amount").readOnly == false)
document.getElementById("convertTo").disabled = false;
}
}
function showConversion () {
var result = document.getElementById("result");
var amount = document.getElementById("amount");
if(amount.value > "") {
amt = parseFloat(amount.value);
var from = document.getElementById("convertFrom");
var to = document.getElementById("convertTo");
conversion = Math.round((parseFloat(amt * parseFloat(multipliers[parseInt(from.value)][parseInt(to.value)])))*100)/100;
if((conversion % 10) == 0)
result.value = conversion + ".00";
else
result.value = conversion;
document.getElementById("multiplier").innerHTML = "* Multiply by " + parseFloat(multipliers[parseInt(from.value)][parseInt(to.value)]) + "
Clear Form";
document.getElementById("convertFrom").disabled = true;
document.getElementById("convertTo").disabled = true;
document.getElementById("amount").readOnly=true;
}
else {
document.getElementById("multiplier").innerHTML = "You must enter an amount to convert.
Clear Form";
amount.focus();
showConvertToOptions();
}
}
function clearForm () {
document.getElementById("convertFromHTML").innerHTML = "";
document.getElementById("convertTo").value = "";
document.getElementById("convertTo").disabled = true;
document.getElementById("amount").value = "";
document.getElementById("amount").readOnly = false;
document.getElementById("result").value = "";
document.getElementById("multiplier").innerHTML = "Clear Form";
}