// JavaScript Document
var bmi = 1;
	var bmi_arr = [
		[0,18.5,'Podváha BMI pod 18,5'],
		[18.5,24.9,'Normálna váha BMI 18,5–24,9'],
		[25.0,29.9,'Nadváha BMI 25,0–29,9<br />(mierne riziko)'],
		[30,34.9,'Obezita 1. stupňa BMI 30,0–34,9<br />(stredné riziko)'],
		[35,39.9,'Obezita 2. stupňa BMI 35,0–39,9<br />(vysoké riziko)'],
		[40,100,'Obezita 3. stupňa BMI >= 40,0<br />(život ohrozujúci rizikový faktor)']
	];    
	window.addEvent('domready',function(e){
		if($$('input[name=vyska]')[0])
			$$('input[name=vyska]')[0].addEvent('change',function(e){
				if(!this.get('value').test('^([0-9]+)?$'))
					this.set('value','');
				else
					this.set('value',this.get('value').toInt());
			});
		if($$('input[name=vaha]')[0])
			$$('input[name=vaha]')[0].addEvent('change',function(e){
				if(!this.get('value').test('^([0-9]+)?$'))
					this.set('value','');
				else
					this.set('value',this.get('value').toInt());
			});
			if($('calc'))
				$('calc').addEvent('click',function(e){
					e.stop();
					var weight = $$('input[name=vaha]')[0].get('value').toInt();
					var height = $$('input[name=vyska]')[0].get('value').toInt()/100;
					if(weight){
						if(height){
							var bmi = Math.round((weight*10)/(height*height))/10;
								if(bmi)
									$('bmi_btn').addClass('off');
									$('bmi_res').removeClass('off');
									bmi_arr.each(function(el){
										if(bmi>=el[0] && bmi<=el[1])
											$('bmi_res').set('html','<b>Hodnota Vášho BMI = '+bmi+'</b> <a href="javascript:Again();">Späť</a> ('+el[2]+')');
									});
						}
					}
				});
	});
	
	function Again() {
		$('bmi_res').addClass('off');
		$('bmi_btn').removeClass('off');
	}