if( String.prototype.trim === undefined )
String.prototype.trim = function()
{
	return( this.replace(new RegExp("^([\\s]+)|([\\s]+)$", "gm"), "") );
}

if( String.prototype.leftTrim === undefined )
String.prototype.leftTrim = function()
{
	return( this.replace(new RegExp("^[\\s]+", "gm"), "") );
}

if( String.prototype.rightTrim === undefined )
String.prototype.rightTrim = function()
{
	return( this.replace(new RegExp("[\\s]+$", "gm"), "") );
}

if( String.prototype.repeat === undefined )
String.prototype.repeat = function(l)
{
	return new Array(l+1).join(this);
}

if( String.prototype.leftPad === undefined )
String.prototype.leftPad = function(l,c)
{
	var s = this, l = l-1;
	if(l >= this.length)
		s = c.toString().repeat(l) + s;
	return s;
}

if( String.prototype.rightPad === undefined )
String.prototype.rightPad = function(l,c)
{
	var s = this, l = l-1;
	if(l >= this.length)
		s += c.toString().repeat(l);
	return s;
}

if( String.prototype.startsWith === undefined )
String.prototype.startsWith =  function(s)
{
	return this.indexOf(s) === 0;
}

if( String.prototype.endsWith === undefined )
String.prototype.endsWith = function(s)
{
	var d = this.length - s.length;
	return d >= 0 && this.lastIndexOf(s) === d;
}

if( String.prototype.toInt === undefined )
String.prototype.toInt = function()
{
	var a = new Array();
	for (var i = 0; i < this.length; i++) {
		a[i] = this.charCodeAt(i);
	}
	return a;
}

if( String.prototype.substringAfter === undefined )
String.prototype.substringAfter = function(c)
{
	return this.substr(this.indexOf(c)+1);
}

if( String.prototype.substringBefore === undefined )
String.prototype.substringBefore = function(c)
{
	return this.substr(0, this.indexOf(c));
}

if( String.prototype.toProperCase === undefined)
String.prototype.toProperCase = function(){
     return this.toLowerCase().replace(/\w+/g,function(s){
          return s.charAt(0).toUpperCase() + s.substr(1);
     })
}