var help_root = "http://www.pccare.co.uk/help/";

function launch_help(help_url)	//displays context sensitive HELP

{

 var popupX = window.open(help_root + help_url, "help_popup", "width=320,height=450");

 popupX.focus();

}



function PreFill()	//fills in form from URL embedded parameters

{

 var sData = GetURLparameter("manu=");

 if (sData != null)

 {

  SetRadio(document.forms[0].part_manu, unescape(sData));

 }

 sData = GetURLparameter("nbr=");

 if (sData != null)

 {

  document.forms[0].part_nbr.value = unescape(sData);

 }

}



function GetURLparameter(sName)		//returns value of URL embedded parameter sName

{

 var sDLs = window.location.search;

 var iPos = sDLs.indexOf(sName);

 if (iPos != -1)

 {

 	var iStart = iPos + sName.length;

	var iEnd = sDLs.indexOf("&",iStart);

	if (iEnd == -1) iEnd = sDLs.length;

	return sDLs.substring(iStart,iEnd);

 }

 else

 {

  return null;

 }

}



function SetRadio(oRadio,sValue)	//checks radio, with value sValue, in group oRadio 

{

 var iIdx;

 for (iIdx=0; iIdx<oRadio.length; iIdx++)

 {

  if (oRadio[iIdx].value == sValue)

	{

	 oRadio[iIdx].checked = true;

	 break;

	}

 }

}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		eng_5_02_sopra = newImage("images/eng-5_02-sopra.jpg");
		eng_5_04_eng_5_02_sopra = newImage("images/eng-5_04-eng-5_02_sopra.jpg");
		eng_5_05_eng_5_23_sopra = newImage("images/eng-5_05-eng-5_23_sopra.jpg");
		eng_5_09_eng_5_07_sopra = newImage("images/eng-5_09-eng-5_07_sopra.jpg");
		eng_5_10_eng_5_02_sopra = newImage("images/eng-5_10-eng-5_02_sopra.jpg");
		eng_5_10_eng_5_07_sopra = newImage("images/eng-5_10-eng-5_07_sopra.jpg");
		eng_5_11_eng_5_02_sopra = newImage("images/eng-5_11-eng-5_02_sopra.jpg");
		eng_5_13_eng_5_07_sopra = newImage("images/eng-5_13-eng-5_07_sopra.jpg");
		eng_5_15_sopra = newImage("images/eng-5_15-sopra.jpg");
		eng_5_16_eng_5_15_sopra = newImage("images/eng-5_16-eng-5_15_sopra.jpg");
		eng_5_22_eng_5_23_sopra = newImage("images/eng-5_22-eng-5_23_sopra.jpg");
		eng_5_23_sopra = newImage("images/eng-5_23-sopra.jpg");
		eng_5_24_eng_5_23_sopra = newImage("images/eng-5_24-eng-5_23_sopra.jpg");
		eng_5_27_sopra = newImage("images/eng-5_27-sopra.jpg");
		eng_5_30_eng_5_23_sopra = newImage("images/eng-5_30-eng-5_23_sopra.jpg");
		eng_5_32_eng_5_27_sopra = newImage("images/eng-5_32-eng-5_27_sopra.jpg");
		eng_5_33_eng_5_27_sopra = newImage("images/eng-5_33-eng-5_27_sopra.jpg");
		eng_5_33_eng_5_42_sopra = newImage("images/eng-5_33-eng-5_42_sopra.jpg");
		eng_5_37_eng_5_23_sopra = newImage("images/eng-5_37-eng-5_23_sopra.jpg");
		eng_5_38_eng_5_27_sopra = newImage("images/eng-5_38-eng-5_27_sopra.jpg");
		eng_5_39_eng_5_27_sopra = newImage("images/eng-5_39-eng-5_27_sopra.jpg");
		eng_5_42_sopra = newImage("images/eng-5_42-sopra.jpg");
		eng_5_44_eng_5_23_sopra = newImage("images/eng-5_44-eng-5_23_sopra.jpg");
		eng_5_47_eng_5_42_sopra = newImage("images/eng-5_47-eng-5_42_sopra.jpg");
		eng_5_48_eng_5_42_sopra = newImage("images/eng-5_48-eng-5_42_sopra.jpg");
		eng_5_48_eng_5_49_sopra = newImage("images/eng-5_48-eng-5_49_sopra.jpg");
		eng_5_49_eng_5_42_sopra = newImage("images/eng-5_49-eng-5_42_sopra.jpg");
		eng_5_49_sopra = newImage("images/eng-5_49-sopra.jpg");
		eng_5_51_sopra = newImage("images/eng-5_51-sopra.jpg");
		eng_5_55_eng_5_42_sopra = newImage("images/eng-5_55-eng-5_42_sopra.jpg");
		eng_5_55_eng_5_49_sopra = newImage("images/eng-5_55-eng-5_49_sopra.jpg");
		eng_5_57_eng_5_49_sopra = newImage("images/eng-5_57-eng-5_49_sopra.jpg");
		eng_5_58_eng_5_51_sopra = newImage("images/eng-5_58-eng-5_51_sopra.jpg");
		eng_5_59_eng_5_51_sopra = newImage("images/eng-5_59-eng-5_51_sopra.jpg");
		eng_5_60_eng_5_49_sopra = newImage("images/eng-5_60-eng-5_49_sopra.jpg");
		eng_5_60_eng_5_51_sopra = newImage("images/eng-5_60-eng-5_51_sopra.jpg");
		eng_5_61_eng_5_51_sopra = newImage("images/eng-5_61-eng-5_51_sopra.jpg");
		preloadFlag = true;
	}
}