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_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];}
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function whyUber(which) {
	MM_swapImgRestore();
	MM_showHideLayers('text_beauty','','hide','text_function','','hide','text_value','','hide');		
	MM_swapImage('img_'+which,'','/images/main/'+which+'_on.jpg',0);
	MM_showHideLayers('text_'+which,'','show');
}

function init() {
		whyUber('beauty');
}

var columns = new Array('first','second','third','forth','fifth','sixth');

function getSelectedIndex(array) {
	for (var i=0; i<array.length; i++) {
		if (array[i].checked) return i;
	}
}

function checkMatrixRow(input) {
	//alert(input + ', ' + input.name + ', ' + input.value + ', ' + input.form.name);
	
	var n = getSelectedIndex(input.form[input.name]); // index of selected button in a radio group (= row number)
	//alert(n);

	// selecting a radio button will remove any other entries in the same row
	// I've grouped buttons by column, so I only need to loop through rows to remove any checked buttons
	
	for (var i=0; i<columns.length; i++) {
		if (columns[i] != input.name) {
			input.form[columns[i]][n].checked = false;
		}
	}
}

function checkColumn(form,n) {
	// for each radio button in column - if one is checked return true

	for (var i=0; i<form[columns[n]].length; i++) {	
		if (form[columns[n]][i].checked == true) return true;
	}
	
	alert('Please enter a selection for column ' + (n+1));
	return false;
}

function checkMatrixForm(form) {
	// check that all columns are filled in: if any column return false, the form fails
	// don't check rows - may have more rows than columns - i.e. non-square matrix

	for (var i=0; i<columns.length; i++) {
		if (!checkColumn(form,i)) return false;
	}
	
	// everthing checked OK
	return true;
}