function Buscar(obj,url) {

	form=obj.form;

	if (form.categoria.value=="0" || form.categoria.value=="") {alert("Please select a Category");form.categoria.focus();return false;}
	if (form.modelo.value=="0" || form.modelo.value=="") {alert("Please select a Model");form.modelo.focus();return false;}

	form.target="_parent";
	form.action=url
	form.submit();

	return true;
}

function disable() {

	tabla=getObj("ocultar");
	tabla.style.visibility="hidden";
	tabla.style.position="absolute";

	tabla=getObj("desocultar");
	tabla.style.height="100%";
	tabla.style.visibility="visible";
	tabla.style.position="relative";

}

function getForm_Parent(formname) {

	if (document.getElementById) {
		return window.parent.document.getElementById(formname);
	} else if (document.all) {
		return window.opener.document.all[formname];
	} else {
		return window.opener.document.all[formname];
	}

}

function check_search_text(form) {
	var search=form.search_text.value;
	if (search=="") {alert("Please type some text to search");form.search_text.focus();return false;}
	if (search.length<3) {alert("Three letters or numbers is the minimum to search");form.search_text.focus();return false;}
	return true;
}