/* alert('loading');
*/

function otherPress() {
	height = document.getElementById('heightotherstate').value ;
	if ( !isNaN(height) ) {
		if ( (height.length == 1 && height >= 5) || (height.length == 2) ) {
			calcTotal();
		}
	}
}

function calcTotal() {
	//get width
	var width =	getSelectedRadioValue(document.forms[1].width) ;

	//get height
	var height = getSelectedRadioValue(document.forms[1].heightpre) ;


	if ( height == 'other' ) {
		height = document.getElementById('heightotherstate').value ;
		if ( isNaN(height) ) {
			alert('The advert must be a minimum of 5cm high');
			document.getElementById('heightotherstate').value = '5' ;
			height = 5 ;
		}
		else {
			if ( height != '' ) {
				if ( height > 32 ) {
					alert('The advert must be a maximum of 32cm high');
					document.getElementById('heightotherstate').value = '32' ;
					height = 32 ;
				}
				if ( height < 5 ) {
					alert('The advert must be a minimum of 5cm high');
					document.getElementById('heightotherstate').value = '5' ;
					height = 1 ;
				}
			}
		}
	}
	
	if ( width!='' && height!='' ) {
		var sqcm = width * height ;
	
		//get type
		if ( getSelectedRadioValue(document.forms[1].type) == 'premium' ) {
			var fee = 500 ;
		}
		else {
			var fee = 0 ;
		}
		
		var numFee = parseInt(fee) ;
		var numSqcm = parseInt(sqcm) ;
		var numCost = parseFloat(44.5) ;
		
		var numTotal = numFee + (numSqcm * numCost);
	
	
		if ( numTotal.toFixed ) {
			numTotal = numTotal.toFixed(2);
		}
		else {
			numTotal = Math.round(numTotal*100)/100 ;
		}
		
		
		//that's the ex-vat total after rounding. VAT is now being applied after rounding (correct?)
		
		var numVat = numTotal * 0.175;
		
		if ( numVat.toFixed ) {
			numVat = numVat.toFixed(2);
		}
		else {
			numVat = Math.round(numVat*100)/100;
		}
		
		//that's vat after rounding.
		
		var numTotalIncVat = (numTotal * 1) + (numVat * 1) ;
//		alert(numTotal);
//		alert(numVat);
//		alert(numTotalIncVat) ;
		
		if ( numTotalIncVat.toFixed ) {
			numTotalIncVat = numTotalIncVat.toFixed(2);
		}
		else {
			numTotalIncVat = Math.round(numTotalIncVat*100)/100;
		}
		
		//that's the total including vat after rounding.
		
		document.getElementById('cost_exvat').value = numTotal;
		document.getElementById('vat').value = numVat;
		document.getElementById('cost').value = numTotalIncVat;
		
		//update the graphic
		
		newwidth = width * 15 ;
		//convert string to number
		width = width * 1;
		newwidth = newwidth * 1;
		newwidth = newwidth + width;
		document.getElementById('highlight').style.width = newwidth+'px';
		document.getElementById('highlight').style.height = Math.round((height * 3.46))+'px';
		
	}
}

function getSelectedRadio(buttonGroup) {

// returns the array number of the selected radio button or -1 if no button is selected
if (buttonGroup[0]) { // if the button group is an array (one button is not an array)
for (var i=0; i<buttonGroup.length; i++) {
if (buttonGroup[i].checked) {
return i
}
}
} else {
if (buttonGroup.checked) { return 0; } // if the one button is checked, return zero
}
// if we get to this point, no radio button is selected
return -1;
} // Ends the "getSelectedRadio" function


function getSelectedRadioValue(buttonGroup) {
// returns the value of the selected radio button or "" if no button is selected
var i = getSelectedRadio(buttonGroup);
if (i == -1) {
return "";
} else {
if (buttonGroup[i]) { // Make sure the button group is an array (not just one button)
return buttonGroup[i].value;
} else { // The button group is just the one button, and it is checked
return buttonGroup.value;
}
}
} // Ends the "getSelectedRadioValue" function


function doload () {
    if (document.getElementsByTagName && document.getElementsByTagName('body')) {
        loadrest ();
    }
}

function loadrest () {
    var list = document.getElementsByTagName('input');
    if (! list)
        return;
    for (var i = 0; i < list.length; ++i)
        if ( (list[i].name == 'width' && ! list[i].onclick) || (list[i].name == 'heightpre' && ! list[i].onclick) || (list[i].name == 'type' && ! list[i].onclick)) {
            list[i].onclick = calcTotal;
        }
    var other = document.getElementById('heightotherstate') ;
    if ( other ) {
    	other.onchange = calcTotal;
    	other.onkeyup = otherPress;
    }
    
}


window.onload = doload;