function SetChecked() {
	//f = document.form.elements;
	//f = document.getElementById('form').elements;
	f = document.forms['form_gyorskereso'];
	
	for (i=0; i<f.elements.length; i++) {
		if (f.elements[i].name == 'gyorkereso_marka[]') {
			//if (document.form.select_all.checked == true) {
			if (document.getElementById('select_all').checked == true) {
				f.elements[i].checked = true;
			}
			else {
				f.elements[i].checked = false;;
			}
		}
	}
}