function splitNumber(what,which) {
        itemLen=what.length;
        if(itemLen>3) {
                output=","+what.substring(what.length-3);
                what=what.substring(0,what.length-3);
        } else {
                return what;
        }
        if(which=="start") {
                return what;
        } else {
                return output;
        }
}

function outputNumber(what) {
        newStart=splitNumber(what,"start");
        if(newStart==what) { return what; }
        newEnd=splitNumber(what,"end");

        newStart2=splitNumber(newStart,"start");
        newEnd2=splitNumber(newStart,"end");

        if(newStart2==newEnd2) {
                output=newStart2+newEnd;
                return output;
        }

        newStart3=splitNumber(newStart2,"start");
        newEnd3=splitNumber(newStart2,"end");

        if(newStart3==newEnd3) {
                output=newStart3+newEnd2+newEnd;
                return output;
        }

        newStart4=splitNumber(newStart3,"start");
        newEnd4=splitNumber(newStart3,"end");

        if(newStart4==newEnd4) {
                output=newStart4+newEnd3+newEnd2+newEnd;
                return output;
        }
}

function sanitisePrice(price) {
	locBracket=price.indexOf("(");
	if(locBracket==-1) { sanePrice=price } else {
		sanePrice=price.substring(0,locBracket);
	}
	return sanePrice;
}

function calculateValue(sharePrice) {
	testVal=document.calc.userInput.value;
	var okChars=".0123456789";
	for(f=0;f<=testVal.length;f++) {
		foundThis=false;
		for(g=0;g<=okChars.length;g++) {
			if(testVal.charAt(f)==okChars.charAt(g)) {
				foundThis=true;
				f++;
			} 
		} 
	}
	if(foundThis==false) {
		alert("Invalid characters entered, please only use characters from this list - '"+okChars+"'."); 
	} else {
		opVal=sharePrice*testVal;
		opString=""+opVal;
		locDot=opString.indexOf(".");
		if(locDot!=-1) {
			output=opString.substring(0,locDot)+opString.substring(locDot,locDot+3);
		} else {
			output=opString+".00";
		}
		if(opString.length<=locDot+2) {
			output=opString+"0";
		}

//		alert(output);
		if(isNaN(opVal)) {
			alert("Invalid characters entered, please only use characters from this list - '"+okChars+"'."); 
		} else {
			content="£"+output;
			opDiv = document.getElementById("scriptOutput");
			opDiv.innerHTML = content;
//			document.all["scriptOutput"].innerHTML=content
		}
	}
}