var Utils = new Utils_class();
var DEFAULT_ZEROS = 2;
var ERROR_COLOR = "pink";

function Utils_class()
{
	var numberASCII =  new Array(0,1,2,3,4,5,6,7,8,9);
	var decimalASCII =  new Array(0,1,2,3,4,5,6,7,8,9,DECIMAL_SEPARATOR);

	this.checkNumberInput = checkNumberInput;
	this.checkValidChar = checkValidChar;
	this.decimalCount = decimalCount;
	this.precise = precise;
	this.trim = trim;

	function checkNumberInput() {
		trimOther(this);
		
		var inputValue = this.value;
		var pickedChars = (this.className=="decimalInput") ? decimalASCII : numberASCII;
		for(var i=0;i<inputValue.length; i++)
		{
			var charMatched = false;
			for(var j=0; j<pickedChars.length; j++)
			{
				if(inputValue.charAt(i)==pickedChars[j])
				{
					charMatched = true;
					break;
				}
			}
			if(charMatched==false)
			{
				this.value = "";
				return false;
			}
		}
		if(this.className=="decimalInput")
		{
			var invalidDecimals = decimalCount(this.value,1);

			if(invalidDecimals==true)
			{
				this.value = "";
				return false;
			}
			precise(this);
		}
		return true;
	}

	function precise(whichObject) {
		var fieldValue = whichObject.value;
		if(fieldValue=="") return;
		
		var decimalDigits = 0;
		
		if(whichObject.accessKey==null || whichObject.accessKey=='' || whichObject.accessKey==undefined || whichObject.accessKey=="undefined" || whichObject.accessKey=="true"){ 
			return;
		}
		try{
			decimalDigits = eval(whichObject.accessKey);
		} catch(err) {decimalDigits = DEFAULT_ZEROS;}
		
		var power = Math.pow(10, decimalDigits);
		var roundedValue = Math.round(parseFloatJS(fieldValue) * power) / power;
		
		roundedValue+="";
		if(roundedValue.indexOf(".") >=0 && DECIMAL_SEPARATOR=="," ){		//DO NOT change the hard coded dot
			var firstPart = roundedValue.substring(0,roundedValue.indexOf("."));
			var lastPart = roundedValue.substring(roundedValue.indexOf(".")+1, roundedValue.length);
			roundedValue = firstPart + DECIMAL_SEPARATOR + lastPart;
		}
		//window.status = roundedValue;
		
		if(roundedValue.indexOf(DECIMAL_SEPARATOR)==-1)
		{
			if(decimalDigits>0){
				var zeros = DECIMAL_SEPARATOR;
				for(var i=0; i<decimalDigits; i++)
					zeros+="0";
				roundedValue+=	zeros;
			}
		}else
		{
			var dotIndex = roundedValue.indexOf(DECIMAL_SEPARATOR);
			var lastPart = roundedValue.substring(dotIndex+1, roundedValue.length);
			if(lastPart.length<decimalDigits)
			{
				var firstPart = roundedValue.substring(0,dotIndex+1);
				var moreDigits = decimalDigits - lastPart.length;
				for(var i=0; i<moreDigits; i++)
					lastPart+="0";
				roundedValue = 	firstPart + lastPart;
			}
		}

		whichObject.value = roundedValue;
	}

	function checkValidChar(){
		var pickedArray = numberASCII;
		var isValidKey = false;

		if(this.className=="decimalInput") {
			if(event.keyCode == DECIMAL_KEY) {
				if(decimalCount(this.value, 0)==true) {
					event.keyCode = null;
					return false;
				}
				else return;
			}
		}

		for(var i=0; i<pickedArray.length;i++){
			var diff = (event.keyCode-48);
			if(diff>=0 && diff<=9) return;
		}
		event.keyCode = null;
		return false;
	}

	function decimalCount(decimalValue, occurance) {
		var decimalCount = 0;
		for(var i=0;i<decimalValue.length; i++) {
			if(decimalValue.charAt(i)==DECIMAL_SEPARATOR) decimalCount++;
			if(decimalCount>occurance) return true;
		}
		return false;
	}
	
	function trim() {
		
		if(this.disabled==true || this.readOnly==true)
			return;
		
		//var unWantedChars = new RegExp("['|<>\"]"); //original code
		var unWantedChars = new RegExp("[|<>\"]"); //single quote removed from original code
		this.value = (this.value.replace(/(\s+)$/,'')).replace(/^(\s+)/,'');
		
		if(this.value=="" && this.required=="true" ){	//if blank
			this.style.backgroundColor = ERROR_COLOR;
		}else if(unWantedChars.exec(this.value)!=null){	//if contains special chars
			this.style.backgroundColor = ERROR_COLOR;
		} else {
			this.style.backgroundColor = "";
		}
	}
	
	function trimOther(whichObject)	{
		if(whichObject.disabled==true || whichObject.readOnly==true){
			return;
		}
		
		if(whichObject.required=="true"){
			var inputValue = (whichObject.value.replace(/(\s+)$/,'')).replace(/^(\s+)/,'');
			if(inputValue=="") {
				whichObject.style.backgroundColor = ERROR_COLOR;
			}else {
				whichObject.style.backgroundColor = "";
			}
		}
	}
}