function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

//set the specified select box's value to the passed-in value
function selectBoxValue(box,val)
{
	for (var i=0; i<box.options.length; ++i)
	{
		if (box.options[i].value == val)
			box.selectedIndex = i;
	}
}

//resets all the elements in the form to neutral values
function resetForm(theForm)
{
	for (var i=0; i<theForm.elements.length; ++i)
	{
		if (theForm.elements[i].type == "text")
			theForm.elements[i].value = "";
		else if (theForm.elements[i].type.substr(0,6) == "select")
			theForm.elements[i].selectedIndex = 0;
	}
}

//constructs a url parameter string out of an assoc. array
function arrayToString(theArray)
{
	var msg = "";
	for (var field in theArray)
	{
		msg += field + "=" + escape(theArray[field]) + "&"
	}
	return msg;
}

function calculateA() {
	var mortgage = new Number(document.ratio_calculator.mortgage.value);
	var card = new Number(document.ratio_calculator.card.value);
	var car = new Number(document.ratio_calculator.car.value);
	var other = new Number(document.ratio_calculator.other.value);

	 var a = mortgage + card + car + other;

	 if(isNaN(a)) {
	 alert("All entries must be numbers");
	 document.ratio_calculator.a.value = "";
	 }
	 else
	 document.ratio_calculator.a.value = a;

	 }
	function calculateB() {
	 var salary = new Number(document.ratio_calculator.salary.value);
	 var bonus = new Number(document.ratio_calculator.bonus.value);
	 var income = new Number(document.ratio_calculator.income.value);
	 var alimony = new Number(document.ratio_calculator.alimony.value);

	 var b = Math.round((salary + bonus + income + alimony) / 12);

	 if(isNaN(b)) {
	 alert("All entries must be numbers");
	 document.ratio_calculator.b.value = "";
	 }
	 else
	 document.ratio_calculator.b.value = b;
	 }
	 function calculateR() {

	 var a = new Number(document.ratio_calculator.a.value);
	 var b = new Number(document.ratio_calculator.b.value);

	if(a=="" || b=="")
	 alert("You have not completed the form");

	 var r = a / b;
	 document.ratio_calculator.ab.value = Math.round(100 * r) + "%";
	 }