function checkAdvanced(adv) {
     newAdv='';advlist=0;
    for (var j=0;j<=adv.length;j++) {
            if (adv.substring(j,j+1) == '{') {
            thisadv=1;
            advstart=j+1;
        } else if (adv.substring(j,j+1) == '}') {
            advend=j;
            advPrice2=adv.substring(advstart,advend);
            advlist++; applicable=true;
            if (applicable==true) {
                newAdv = newAdv+ '{'+advFrom+'~'+advTo+'~'+advPrice+'~'+advPrice2+'}'
            }
        } else if (adv.substring(j,j+1)=='~') {
            if (thisadv== 1) advFrom=adv.substring(advstart,j);
            if (thisadv== 2) advTo=adv.substring(advstart,j);
            if (thisadv== 3) advPrice=adv.substring(advstart,j);
            if (thisadv== 4) advPrice2=adv.substring(advstart,j);
            thisadv++;advstart=j+1;
        }
    }
    if (newAdv=='') newAdv='none';
    return newAdv;
}
function buyItem(newItem,newPrice,newTaxable,newWeight,newAP,newQuantity) {
	if(newQuantity<=0) {
		rc = alert('The quantity entered is incorrect');
	} else {
		if (confirm('Add '+newQuantity+' x '+newItem+' to your purchases? ')) {
			 if (newAP!='none') {
				 newAP=checkAdvanced(newAP);
			 }
			index=document.cookie.indexOf('TheBasket');
			countbegin=(document.cookie.indexOf('=',index)+1);
			countend=document.cookie.indexOf(';',index);
			if(countend==-1) { countend=document.cookie.length; }
			 fulllist = document.cookie.substring(countbegin,countend);
			 amended = false;
			 newItemList=''; itemlist=0;
			 for (var i=0;i<=fulllist.length;i++) {
				 if (fulllist.substring(i,i+1) == '[') {
					 thisitem=1;
					 itemstart=i+1;
					 fullstart=i+1;
				 } else if (fulllist.substring(i,i+1) == ']') {
					 itemend=i;
					 thequantity=fulllist.substring(itemstart,itemend);
					 itemlist++;
					 if (theItem==newItem ) {
						 amended=true;
						 tempquantity=eval(thequantity)+eval(newQuantity);
						 newItemList=newItemList+'['+theItem+'|'+thePrice+'|'+theTaxable+'|'+theWeight+'|'+newAP+'|'+tempquantity+']';
					 } else {
						 newItemList=newItemList+'['+theItem+'|'+thePrice+'|'+theTaxable+'|'+theWeight+'|'+theAP+'|'+thequantity+']';
					 }
				 } else if (fulllist.substring(i,i+1)=='|') {
					 if (thisitem==1) theItem=fulllist.substring(itemstart,i);
					 if (thisitem== 2) thePrice=fulllist.substring(itemstart,i);
					 if (thisitem== 3) theTaxable=fulllist.substring(itemstart,i);
					 if (thisitem== 4) theWeight=fulllist.substring(itemstart,i);
					 if (thisitem== 5) theAP=fulllist.substring(itemstart,i);
					 thisitem++;itemstart=i+1;
				 }
			 }
			 if (amended==false) {
				 newItemList=newItemList+'['+newItem+'|'+newPrice+'|'+newTaxable+'|'+newWeight+'|'+newAP+'|'+newQuantity+']'; }
			 index = document.cookie.indexOf('TheBasket');
			 document.cookie='TheBasket='+newItemList+';';

			 window.location.href="shopping_cart.htm";
		}
	}
}