//allow only 0-9
function maskKeyPress(e) {
var key = window.event ? e.keyCode : e.which;
	if( ((key>=48) && (key<=57)) || key==0 || key==8) return true;
	return false;
}

function change_length(obj){
	var str_land = obj.value;
	var el_pc = document.getElementById('txt_pc');
	var el_pc_lt = document.getElementById('txt_letterpc');
	if (str_land == js_default_country_id){
		el_pc.setAttribute("maxLength","4");
		el_pc.setAttribute("onKeyPress","return maskKeyPress(event);");
		document.getElementById('pc_nr_addon').style.display='';
	}else{
		el_pc.setAttribute("maxLength","10");
		el_pc.setAttribute("onKeyPress","");
		document.getElementById('pc_nr_addon').style.display='none';
	}
}

function update_pc(){
	if (document.getElementById('txt_pc').value!='' && document.getElementById('txt_letterpc').value!='' && document.getElementById('txt_pc_nr').value!=''){
		xajax_getStreet_City(document.getElementById('txt_pc').value, document.getElementById('txt_letterpc').value, document.getElementById('txt_pc_nr').value);
	}
}