function inputFocusChange(el, img_name)
{
	if(el){
		el.style.backgroundImage = (el.value == '')?img_name:'';
	}
}

function initSearchForm()
{
	inputFocusChange(document.getElementById('price_min'), 'url(\'img/no_min.gif\')');
	inputFocusChange(document.getElementById('price_max'), 'url(\'img/no_max.gif\')');
}