function toggle(element) {
	var ele = document.getElementById(element);
	if (ele.style.display == 'block') {
		ele.style.display = 'none';
	} else {
		ele.style.display = 'block';
	}
}
function toggleMenu(cat) {
	if (cat != 'sound') {
		document.getElementById('sound').style.display = 'none';
	}
	if (cat != 'lights') {
		document.getElementById('lights').style.display = 'none';
	}
	if (cat != 'other') {
		document.getElementById('other').style.display = 'none';
	}
	if (cat != 'info') {
		document.getElementById('info').style.display = 'none';
	}
	var ele = document.getElementById(cat);
	if (ele.style.display == 'block') {
		ele.style.display = 'none';
	} else {
		ele.style.display = 'block';
	}
}

function populate(element, newValue) {
	if (document.getElementById(element).value == '') {
		document.getElementById(element).value = newValue;
	}
}

function unPopulate(element) {
	document.getElementById(element).value = '';
}

function calculateRentCost(rentPrice, days) {
	procent = 2;
	
	if (days < 3) {
		procent += days;
	} else {
		procent += 3;
	}
	
	if (days > 3 && days < 11) {
		procent += (days -3 ) * 0.5; 
	} else {
		if (days > 3) {
			procent += 3.5;
		}
	}
	
	if(days > 10 && days < 91 ) {
		procent += (days - 10) * 0.3;
	} else {
		if(days > 10 ) {
			procent += 80 * 0.3;
		}
	}
	
	if(days > 90 ) {
		procent += (days - 90) * 0.15;
	}
	
	procent = procent / 100;
	//discount = procent * rentPrice;
	//dailyCost = rentPrice - discount;
	//cost = dailyCost * days;
	
	//return round(cost, 0);
	return procent * rentPrice;
}