var SF_sumbit_image_ua = new Image();
var SF_sumbit_image_ru = new Image();
var SF_sumbit_image_en = new Image();
var SF_sumbit_image_over_ua = new Image();
var SF_sumbit_image_over_ru = new Image();
var SF_sumbit_image_over_en = new Image();
SF_sumbit_image_ua.src = "/imgs/btn-search-ua.gif";
SF_sumbit_image_ru.src = "/imgs/btn-search-ru.gif";
SF_sumbit_image_en.src = "/imgs/btn-search-en.gif";
SF_sumbit_image_over_ua.src = "/imgs/btn-search-ua_.gif";
SF_sumbit_image_over_ru.src = "/imgs/btn-search-ru_.gif";
SF_sumbit_image_over_en.src = "/imgs/btn-search-en_.gif";

function SFOver(img, lang)
{
	if(lang == 'en') img.src = SF_sumbit_image_over_en.src;
	if(lang == 'ru') img.src = SF_sumbit_image_over_ru.src;
	if(lang == 'ua') img.src = SF_sumbit_image_over_ua.src;	
}

function SFOut(img, lang)
{
	if(lang == 'en') img.src = SF_sumbit_image_en.src;
	if(lang == 'ru') img.src = SF_sumbit_image_ru.src;
	if(lang == 'ua') img.src = SF_sumbit_image_ua.src;
}

function SFFocus(field, title)
{
	if (field.className == "empty" && field.value == title)
	{
		field.className = "";
		field.value = "";
	}
}

function SFBlur(field, title)
{
	if(!RegExp(/\S/).test(field.value)) 
	{
		field.className = "empty";
		field.value = title;
	}
}

function ValidateSearchForm(form, lang)
{
	if(form.search_string.className == "empty") return(false);
	if(!RegExp(/\S{4,}/).test(form.search_string.value)) 
	{
		if(lang == 'en') alert("Invalid searching query!\nA query must be more 3th characters.");
		if(lang == 'ru') alert("Некорректный поисковый запрос!\nЗапрос должен быть более 3-х символов.");
		if(lang == 'ua') alert("Некоректний пошуковий запит!\nЗапит повинен бути більш 3-х символів.");
		return(false);
	}	
	return(true);
}