самопечатающийся placeholder

var char_timeout=50;
var story_timeout=2000;
var placeholders=new Array();
	placeholders[0]='труба';
	placeholders[1]='проточный водонагреватель';
	placeholders[2]='фильтр';
	placeholders[3]='бак';
	placeholders[4]='сифон';
	placeholders[5]='теплый пол';
	placeholders[6]='душевая кабина';
	placeholders[7]='емкость';
	placeholders[8]='горелка';
	placeholders[9]='арматура';
	placeholders[10]='бойлер';
	placeholders[11]='газовый котел';
	placeholders[12]='наcос';
function start_printing(){
	item_count=Number(placeholders.length);
	current_placeholder=-1;
	current_length=0;
	input=$('input[name=search_string]');
	run_printing();
}
function run_printing(){
	var timeout;
	if(current_length==0){
		current_placeholder++;
		current_placeholder=current_placeholder%item_count;
		placeholder=placeholders[current_placeholder].replace(/"/g,'-');
	}
	input.attr('placeholder',placeholder.substring(0,current_length)+current_char());
	if(current_length!=placeholder.length){
		current_length++;
		timeout=char_timeout;
	}
	else{
		current_length=0;
		timeout=story_timeout;
	}
	setTimeout("run_printing()",timeout);
}
function current_char(){
	if(current_length==placeholder.length){
		return "";
	}
	else{
		return "|";
	}
}
start_printing();