String.prototype.trim = function() {
	   return this.replace(/^\s+|\s+$/g,"");
	}
	
	String.prototype.ltrim = function() {
	   return this.replace(/^\s+/g,"");
	}
	
	String.prototype.rtrim = function() {
	   return this.replace(/\s+$/g,"");
	}
	
	String.prototype.toTF = function() {
		return this.match(/(^(t|m|on|y|1))/i);
	}
	
	String.prototype.tf = function(TTxt,FTxt) {
		return this.toTF() ? TTxt : FTxt;
	}
	
	String.lDefaultSeparator = function() {
		return ",";
	}
	
	String.prototype.lSplit = function(sep) {
		if (sep == null) sep = String.lDefaultSeparator()
		var llist = new Array();
		if (this != "") {
			var temp = sep + this
			for (var pos = temp.indexOf(sep,0); pos >= 0 ; pos = temp.indexOf(sep,pos+1)) {
				var endpos = temp.indexOf(sep,pos+1);
				if (endpos < 0) endpos = temp.length;
				llist[llist.length] = temp.substring(pos+sep.length,endpos);
			}
		}
		return llist;
	}
	
	String.prototype.lCount = function(sep) {
		if (sep == null) sep = String.lDefaultSeparator();
		return this.lSplit(sep).length;
	}
        
 	String.prototype.lGet = function(item,sep) {
		if (sep == null) sep = String.lDefaultSeparator();
		var llist = this.lSplit(sep);
		if ((item >= 0) && (item < llist.length)) {
			return llist[item];
		} else {
			return "";
		}
	}
        
 	String.prototype.lGets = function(start,end,sep,llist) {
		var result;
		if (sep == null) sep = String.lDefaultSeparator();
		if (llist ==  null) llist = this.lSplit(sep);
		if (start == null) start = 0;
		if (start < llist.length) {
			result = llist[start];
			if ((end == null) || (end >= llist.length)) end = llist.length -1
			for (i=start+1;i<=end;i++) {
				result += sep + llist[i];
			}
		}
		return result;
	}
        
 	String.prototype.lLast = function(number,sep) {
		if (sep == null) sep = String.lDefaultSeparator();
		var llist = this.lSplit(sep);
		if (number == null) number = 1;
		var from = llist.length - 1 - (number - 1);
		return this.lGets(from,null,sep,llist);
	}
        
 	String.prototype.lRest = function(number,sep) {
		if (sep == null) sep = String.lDefaultSeparator();
		var llist = this.lSplit(sep);
		if (number == null) number = 1;
		var from = number;
		return this.lGets(from,null,sep,llist);
	}

       String.prototype.stem = function(sep) {
            if (sep == null) sep = String.lDefaultSeparator();
            var llist = this.lSplit(sep);
            var to = llist.length - 2;
            return this.lGets(0,to,sep,llist);
        }
        
       String.prototype.leaf = function(sep) {
            if (sep == null) sep = String.lDefaultSeparator();
            var llist = this.lSplit(sep);
            var from = llist.length - 1;
            return this.lGets(from,null,sep,llist);
        }
        
  	String.prototype.lFind = function(what,sep) {
		if (sep == null) sep = String.lDefaultSeparator();
		var llist = this.lSplit(sep);
		for (var i = 0; i < llist.length; i++) {
			if (llist[i] == what) {
				return i
			}
		}
		return -1;		
	}
	
	String.prototype.lSet = function(item,what,sep,llist) {
		if (sep == null) sep = String.lDefaultSeparator();
		if (llist == null) llist = this.lSplit(sep);
		llist[item] = what;
		var result = this.lGets(null,null,sep,llist);
		return result;
	}
	
	String.prototype.lSets = function(start,end,what,sep) {
		if (sep == null) sep = String.lDefaultSeparator();
		var llist = this.lSplit(sep);
		this.lSet(start,what,sep,llist);
		if (end > start) llist.splice(start+1,end-start);
		var result = this.lGets(null,null,sep,llist);
		return result;
	}
	
        String.prototype.lDelete = function(item,sep) {
            if (sep == null) sep = String.lDefaultSeparator();
            var llist = this.lSplit(sep);
            llist.splice(item,1)
            return llist.join(sep);
        }