function OnChangeCategory(catorder, defitem, defcolor)
{
  category = eval ("document.cart_quantity.Cat" + catorder);
  var firsttime = true;
  if (defitem == -1) {
    firsttime = false;
    defitem = category.selectedIndex;
  }
  arrItems = eval ("arrItems" + catorder);
  var desc = arrItems[defitem][0];
  curprice = arrItems[defitem][1];
  updateMenu (category, defitem, arrItems);
  if (firsttime)
    g_dTotal = g_dTotal + curprice;
  else {
    g_dTotal = g_dTotal - arrPrices[catorder] + curprice;
    UpdatePrice (g_dTotal);
  }
  arrPrices[catorder] = curprice;
}
function updateMenu (menu, defaultindex, arrItems)
{
    if (!menu)
      return;

    defaultprice = arrItems[defaultindex][1];
    for (i = 0; i < arrItems.length; i++) {
      var desc = arrItems[i][0];
      if (arrItems[i][4] == 0 && i != defaultindex) {
		    var pricediff = arrItems[i][1] - defaultprice;
	        if (pricediff >= 0)
	          sufix = " [+" + pricediff + "]";
	        else
		    		sufix = " [" + pricediff + "]";
		    desc += sufix;
      }

		  menu.options[i] = new Option(desc, arrItems[i][2]);
		  menu.options[i].text = desc;
	    menu.options[i].value = arrItems[i][2];
    }

    for (i = menu.length - 1; i >= arrItems.length; i--)
      menu.options[i] = null;

    menu.selectedIndex = defaultindex;
}

function RoundPrice(nValue)
{
    sign = (nValue >= 0) ? 1 : -1;

    nValue = Math.abs (nValue);
	var nTempValue = nValue*100;
	nTempValue = Math.round(nTempValue);
	var nRemainder = nTempValue % 100;
	nTempValue -= nRemainder;		// get rid of decimals..

	nTempValue /= 100;

	var strValue = nTempValue.toString();
	var strDecimals = nRemainder.toString();
	if (strDecimals.length < 2)
		strDecimals = "0" + strDecimals;

	var strResult = strValue + "." + strDecimals;
	return strResult * sign;
}

function ChangeinnerHTML(layerid, htmlcode) {
    var statement = ''; //alert(document.all["' + layerid + '"].innerHTML);
 
    if (document.all){
	  	statement += "document.all['" + layerid + "'].innerHTML = '" + htmlcode + "';";
	  	//alert(statement);
	  	eval(statement);
	  	//alert(eval("document.all['" + layerid + "'].innerHTML"));
	  	/*
	  	tmpLayer = eval("document.all['" + layerid + "']");
	  	alert (tmpLayer.innerHTML + " "+tmpLayer.innerText);
	  	tmpLayer.innerHTML =  htmlcode ;*/
	  } else { 
		  if (document.getElementById){
		  	statement += "document.getElementById('" + layerid + "').innerHTML = '" + htmlcode + "';";
		  	eval(statement);
		  } else {
		    if (document.layers){
			    /*for (i=0; i<document.layers.length;i++)
			    	alert(document.layers[i].id); */
			    var tempLay=eval("document.layers['" + layerid + "'].document"); 
					tempLay.open(); 
					tempLay.write("<layer class='pageHeading'>"+
					htmlcode + 
					"</layer>");
					tempLay.close(); 
				}
			}
		}
}

function ValidNumber (str)
{
   return ! isNaN (str * 1);
}
function UpdatePrice(price)
{
 viewprice = RoundPrice(price);
 totalprice = viewprice + "";
 if (totalprice.indexOf (".") == -1)
   totalprice += ".00";
 
 
 ChangeinnerHTML("pricetop", totalprice);
 
 ChangeinnerHTML("pricebottom", totalprice);
}
function NewWindow(url, myname, w, h, scroll)
{
   var winl = (screen.width - w) / 2;
   var wint = (screen.height - h) / 2;
   winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable=1';
   win = window.open(url, myname, winprops);
   if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}