function mysearch(param){
	var e = document.getElementById('page');
	if(param == 'prev')		
		e.value = parseInt(e.value) - 1; 
	if(param == 'next')
		e.value = parseInt(e.value) + 1; 
	var input_num = 3;
	var is_one_checked = false;	
	for(var i=0; i< input_num;i++){
		var name = 'category_'+i;
		if( document.getElementById(name).checked )
			is_one_checked = true;
	}
	if(! is_one_checked){
		alert("Check one item" );
		return false;
	}		
		
	new Ajax.Updater('lista_ofert', 'http://www.findit.com.pl/job/search/', {asynchronous:true, evalScripts:true,onComplete:function(request, json){Element.hide('indicator_filter');},onLoading:function(request, json){Element.show('indicator_filter');}, parameters:Form.serialize(document.getElementById("searchForm"))});
	return false;
}