function verify() {

	var fl = document.getElementById("form_location").selectedIndex;
	var fp = document.getElementById("form_price").selectedIndex;
	var fs = document.getElementById("form_style").selectedIndex;

	if((fl == 0 || fl == 1) && (fp == 0 || fp == 1) && (fs == 0 || fs == 1)) {
		alert("Please select at least one category.");
		return false;
	} else {
		return true;
	}
}