$(document).ready(function(){

	//if( $('.currency').length ){
		function calc(t){
			var currency_from = $('#currency_from').val();
			var currency_to = $('#currency_to').val();
			var sum = $('#sum').val();
			if(t == 0){
				sum = readCookie("calc_sum");
				$('#sum').val(sum);

				currency_from = readCookie("calc_from");
				$('#currency_from [value="'+ currency_from +'"]').attr('selected', true);

				currency_to = readCookie("calc_to");
				$('#currency_to [value="'+ currency_to +'"]').attr('selected', true);
			}

			if(sum !== null){
				sum = sum.replace(',','.');
			}

			if(sum > 0 && currency_from != '' && currency_to != ''){
				createCookie("calc_sum", sum);
				createCookie("calc_from", currency_from);
				createCookie("calc_to", currency_to);
				var buy = curr_buy[ currency_from ] * sum;
				var amount = buy / curr_sell[ currency_to ];
				// amount = Math.round( amount *Math.pow(10,2))/Math.pow(10,2);
				amount = Math.round( amount *100)/100;
				//alert(amount);
				//if(amount > 0){
					$('#amount').text( amount );
				//}
			}
		}

		$('#cur_name').change(function(){
			window.location = '?cid='+ this.value;
		});

		$('#currency_from, #currency_to, #sum').change(function(){
			calc(1);
		});
		$('#currency_from, #currency_to, #sum').keyup(function(){
			calc(1);
		});
		calc(0);
	//}

});


// cookies

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}