String.prototype.capitalize=function(){return this.charAt(0).toUpperCase()+this.slice(1);};
String.prototype.followCase=function(b){
	if(b==b.toUpperCase()){return this.toUpperCase();}
	if(b==b.toLowerCase()){return this.toLowerCase();}
	if(b==b.capitalize()){return this.capitalize();}
	return this;
};
String.prototype.atRemoveAdd=function(index,n,string){
	return this.substring(0,index)+string+this.substring(index+n,this.length);
};
String.prototype.matchIndex=function(re){
	var a=[];
	while((match=re.exec(this))!==null){
		a.push({chars:match[0].length,index:match.index});
	}
	return a;
};
String.prototype.caseReplace=function(o,n){
	for(var s=this,a=this.matchIndex(o),shift=0,i=0;i<a.length;i++){
		var c=n.followCase(this.substring(a[i].index,a[i].index+a[i].chars));
		s=s.atRemoveAdd(a[i].index+shift,a[i].chars,c);
		shift+=c.length-a[i].chars;
	}
	return s;
};