// JavaScript Document

var LAYER_TITLE_BACKGROUND = "images/cover.png";

function getnewfeed() {
	var params = "feednum=" + document.getElementById("feednum").options.selectedIndex;
	var myAjax = new Ajax.Updater('page_content','getfeed.php',{method: 'post', parameters: params, onCreate: setSpinner("page_content")});
}

function setSpinner(spinnum) {
	document.getElementById(spinnum).innerHTML="<p align=\"center\"><img src=\"images/spinning_gear.gif\" alt=\"\" /></p>";
}

function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

function createxwindow(title, content, js) {
	var productElement = document.getElementById("poster");
	if (productElement == null) {
	title = "<img src='images/spacer.gif' width='600' height='800' alt='' />";
    var xwin = document.createElement("div");

    xwin.style.position = "absolute";
    xwin.style.height = "800px";
    xwin.style.width = "600px";
    xwin.id = "xwin";
	
    xwin.style.top = ((window.innerHeight - 800) / 2) + "px";
    xwin.style.left = ((window.innerWidth - 600) / 2) + "px";


    var html = "<div id='poster' style='width:600px;background:url("+LAYER_TITLE_BACKGROUND+") left top;background-repeat:no-repeat; height:800px;color:#fff;line-height:32px;color:#fff;text-align:center;padding-top:100px;z-index:200;position:fixed;' onclick='closexwindow(\""+js+"\")'><img src='images/posters/large/" + content + "' height='600' width='400' hspace='100' alt='' /></div>";

    xwin.innerHTML = html;

   
    document.body.appendChild(xwin);
	}
}
		
		function closexwindow(js) {
 
    var xwin = document.getElementById("xwin");

    document.body.removeChild(xwin);

    if (js!=null && js.length>0)
        eval(js);
}

function calccals() {
	var gender = document.getElementById("gender").options[document.getElementById("gender").options.selectedIndex].value;
	var height_feet = document.getElementById("feet").options[document.getElementById("feet").options.selectedIndex].value;
	var height_inches = document.getElementById("inch").options[document.getElementById("inch").options.selectedIndex].value;
	var weight_lbs = document.getElementById("weight").value;
	var years_of_age = document.getElementById("age").value;
	var activity_index = document.getElementById("alevel").options[document.getElementById("alevel").options.selectedIndex].value;

	if((!(CheckValues(weight_lbs))) || (!(CheckValues(years_of_age)))) {
		alert("Please enter numbers for both weight and age.");
	} else {
		var total_inches = parseInt(height_feet * 12) + parseInt(height_inches);
		var centimeters = total_inches * 2.54;
		var kilograms = weight_lbs/2.2;
		if(gender == 1) {  // Female calculation values
			var adjust_weight = 655 + (9.6 * kilograms);
			var adjust_height = 1.7 * centimeters;
			var adjust_age = 4.7 * years_of_age;
		} else {  // Male calculation values
			var adjust_weight = 66 + (13.7 * kilograms);
			var adjust_height = 5 * centimeters;
			var adjust_age = 6.8 * years_of_age;
			}
		document.getElementById("calories").innerHTML = "<br />You'll need to eat <span class=\"bold\">" + Math.ceil((adjust_weight + adjust_height - adjust_age) * activity_index) + "</span> calories per day to maintain your current weight.";
	}
}


function CheckValues(this_string) {
	var is_number = true;
	var string_length = this_string.length;
	if(string_length == 0) {
		is_number = false;
	} else {
		for(count = 0; count < string_length; count++) {
			if((this_string.charAt(count) < "0") || (this_string.charAt(count) > "9")) {
				is_number = false;
				break;
			}	
		}
	}
	return is_number;
}


function reset() {
	document.getElementById("gender").options.selectedIndex = 0;
	document.getElementById("feet").options.selectedIndex = 4;
	document.getElementById("inch").options.selectedIndex = 0;
	document.getElementById("weight").value = "";
	document.getElementById("age").value = "";
	document.getElementById("alevel").options.selectedIndex = 2;
	document.getElementById("calories").innerHTML = "";
}