function onClickSearch() {
	var elemAgeFrom = document.getElementById("txt_from");
	var elemAgeTo 	= document.getElementById("txt_to");
	if(isNaN(elemAgeFrom.value)) elemAgeFrom.value = 20; 
	if(isNaN(elemAgeTo.value)) elemAgeTo.value = 80; 
}

function onClickOrderBy(iPageNo) {
	
	var iOrderBy 	= document.getElementById("orderby").value;
	var iSex 		= document.getElementById("txt_sex_user").value;
	var iSearch 	= document.getElementById("txt_sex_search").value;
	var iFrom 		= document.getElementById("txt_from").value;
	var iTo 		= document.getElementById("txt_to").value;
	var iCountry 	= document.getElementById("txt_country").value;
	
	location.href = "results.php?orderby=" + iOrderBy + "&page_no=" + iPageNo;	
}