function getDistance(baseX, baseY, playerX, playerY) {
	return Math.round(Math.sqrt((Math.pow(Math.abs(baseX-playerX), 2.0)+Math.pow(Math.abs(baseY-playerY), 2.0))));
}



function getCalculatedAttackPrice(totalUnitsCount, defenderX, defenderY) {
	return 1 * Math.round(getDistance('', '', defenderX, defenderY)/10.0) * totalUnitsCount;

}

function displayAttackPrice(unitsCountSelector, defenderX, defenderY) {
	document.getElementById('price').innerHTML = getCalculatedAttackPrice(getTotalUnitsCount(), defenderX, defenderY);
}

function getTotalUnitsCount() {
	var totalUnitsCount = 0;
	inputComponents = document.getElementsByTagName('input');	
	var unitsCount;
	for(var i=0; i<inputComponents.length; i++) {
		unitsCount = parseInt(inputComponents[i].value);
		if(unitsCount > 0)
			totalUnitsCount += unitsCount;
	}
	return totalUnitsCount;
}


function submitForm(formName) {
	document.getElementById(formName).submit();
}