var errmsg0 = "Error Message(s)：<br />";
var errmsg1 = "- Insert name<br />";
var errmsg2 = "- Insert telephone<br />";
var errmsg3 = "- Insert e-mail<br />";
var errmsg4 = "- Insert message<br />";

function formCheck(form) {
    var code1     = form.textfield1.value;
    var code4     = form.textfield4.value;
	var code5     = form.textfield5.value;
	var code6     = form.textfield6.value;
    var err       = errmsg0;

    if (code1.length < 1)			err += errmsg1;
    if (code4.length < 1)			err += errmsg2;
	if (code5.length < 1 || code5.match(/([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9._-]+)/gi) == null)
			err += errmsg3;
	if (code6.length < 1)			err += errmsg4;

    if (err.length > errmsg0.length) {
        form.textfield1.focus();
		document.getElementById("errmsg").innerHTML = err;
//        window.alert(err);
        return false;
    }
    else
        return true;
}