// weight calculator
function resetres(){
	document.f.lowerkilos.value = 0;
	document.f.upperkilos.value = 0;
	document.f.lowerpounds.value = 0;
	document.f.upperpounds.value = 0;
}

function calculate(){

	var bmr = document.f.kilos.value / (document.f.metres.value * document.f.metres.value);
	var lower = 0;
	var upper = 0;
	var mid = document.f.month.value
	
	if (bmr < 18) {
		lower = mid * 1.3;
		upper = mid * 1.54;
	}
	if (bmr >= 18 && bmr <=20) {
		lower = mid * 1;
		upper = mid * 1.3;
	}
	if (bmr > 20 && bmr <= 23) {
		lower = mid * 0.8;
		upper = mid * 1.2;
	}
	if (bmr > 23) {
		lower = mid * 0.65;
		upper = mid * 0.85;
	}

var clk = Math.round(document.f.kilos.value * 100);
var clk2 = Math.round(lower * 100);
var clk3 = Math.round(upper * 100);

document.f.lowerkilos.value = (clk + clk2) / 100;
document.f.upperkilos.value = (clk + clk3) / 100;


document.f.lowerpounds.value = Math.round(document.f.lowerkilos.value * 2.21);
document.f.upperpounds.value = Math.round(document.f.upperkilos.value * 2.21);

//NEW FOR COOKIES
var expiry = new Date();
expiry.setTime(expiry.getTime() + (300*24*60*60*1000));
document.cookie = "CalcData=" + document.f.kilos.value + "|" + document.f.month.selectedIndex + "|" + document.f.metres.value +  "|" + ";" + "expires=" + expiry.toGMTString() + ";" ;



}


function convertHmetric(){
	var calcH = document.f.inches.value;
	calcH = Math.round(calcH);
	calcH = calcH + (Math.round(document.f.feet.value) * 12);
	calcH = calcH * 0.0254;
	calcH = calcH * 100;
	calcH = Math.round(calcH);
	calcH /= 100;
	document.f.metres.value = calcH;
resetres();
}

function convertHimp(){
	var calcH2 = 0;
	var calcH3 = 0;
	var calcH4 = 0;
	calcH2 = document.f.metres.value * 39.37;
	calcH3 = Math.floor(calcH2 / 12);
	calcH4 = Math.round(calcH2 - (calcH3 * 12));
	document.f.feet.value = calcH3;
	document.f.inches.value = calcH4;
	
resetres();
}

function convertWmetric(){
	var calcH5 = document.f.pounds.value;
	calcH5 = Math.round(calcH5);
	calcH5 = calcH5 * 0.4524;
	calcH5 = calcH5 * 10;
	calcH5 = Math.round(calcH5);
	calcH5 /= 10;
	document.f.kilos.value = calcH5;
	
resetres();
}

function convertWimp(){
	var calcH6 = document.f.kilos.value;
	calcH6 = Math.round(calcH6);
	calcH6 = calcH6 * 2.21;
	calcH6 = Math.round(calcH6);
	document.f.pounds.value = calcH6;
	
resetres();
}



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