// Standard Rules

var objUsername = ".0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz";
var objNumber = ".0123456789";
var objMoney = ".,0123456789";
var objWholeNumber = "0123456789";
var objPhone = "-()0123456789 ";
var objAlpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz ";
var objAlphaNum = ".-()0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz ";
var objZip = ".-()0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz";

function isRule(oComp, sRule, nLength, fdecimal){
    if (fdecimal == "" || typeof (fdecimal) == "undefined") {       
		fdecimal = false;
	}	
	//If the object is not specified return false
	if (typeof(oComp) == 'undefined' || oComp == null || oComp == ''){
		alert('Error: Input object not specified.');
		return false;
	}
	//If neither rule nor max length is specified, return false
	else if (typeof(sRule) == 'undefined' && typeof(nLength) == 'undefined'){
		alert('Error: No rule/maximum length for input object specified.');
		return false;
	}

	var noErrorFlg = true;

	//If object is specified and either of rule is specified,
	if(typeof(sRule) != 'undefined' && sRule != null){
		var temp;
		sRule = sRule + "";
		var discardChars = false;
		if(sRule.length > 0 && sRule.charAt(0) == "~"){
			sRule = sRule.substring(1);
			discardChars = true;
		}

		if(typeof(oComp) == "undefined" || typeof(sRule) == "undefined")
			return false;
        var FlagToCount = 0;
		for (var i = 0;i < oComp.value.length;i++){
			temp = oComp.value.charAt(i);

			if (temp == '.') {
			    FlagToCount = FlagToCount + 1;
			}
			if (FlagToCount > 1) {
			    discardChars = true;
			}
			if((!discardChars && sRule.indexOf(temp) == -1) || (discardChars && sRule.indexOf(temp) >= 0)){
				//alert("Field disobeys entry rule.  Following are the valid characters:\n" + sRule);
				//alert("Invalid Character!");
				oComp.value = oComp.value.substring(0,i);// + (oComp.value.length > i ? oComp.value.substring(i+1):"");
				noErrorFlg = false;
				break;
			}
		}
	}
	
	if(nLength){
		if(fdecimal){
			nLength -= fdecimal;
			var dp = oComp.value.indexOf(".");
			var p1;
			var p2 = "";
			if(dp >= 0){
				p1 = oComp.value.substring(0,dp);
				p2 = oComp.value.substring(dp+1);
			}
			else{
				p1 = oComp.value;
			}
			if(p1.length > nLength){
				oComp.value = oComp.value.substring(0,nLength);
				return noErrorFlg;
			}
			for(var i = 0;i < p2.length;i++){
				var ch = p2.charAt(i);
				if(ch < '0' || ch > '9'){
					oComp.value = p1 + "." + p2.substring(0,i);
					return noErrorFlg;
				}
			}
			if(p2.length > fdecimal){
				oComp.value = p1 + "." + p2.substring(0,fdecimal);
			}
		}
		else if(oComp.value.length > nLength){
			oComp.value = oComp.value.substring(0,nLength);
		}
	}
	return noErrorFlg;
}


function isImage(obj) {
    if (obj.value.length > 0) {
        if (obj.value.length > 4) {
            var ext = obj.value.substring(obj.value.length - 3, obj.value.length);
            if (ext == 'jpg' || ext == 'JPG' || ext == 'gif' || ext == 'GIF' || ext == 'png' || ext == 'PNG' || ext == 'jpeg' || ext == 'JPEG') {
                return true;
            }
            else
                return false;
        }
        else
            return false;
    }
}