参考下面的两个自己写吧:
function checkUsername (strng) {
var error = "";
if (strng == "password") {
error = "You didn't enter a username.\n";
}function checkPassword (strng) {
var error = "";
if (strng == "") {
error = "You didn't enter a password.\n";
}
var illegalChars = /[\W_]/; // allow only letters and numbers
if ((strng.length < 6) || (strng.length > 8)) {
error = "The password is the wrong length.\n";
}
else if (illegalChars.test(strng)) {
error = "The password contains illegal characters.\n";
}
function checkUsername (strng) {
var error = "";
if (strng == "password") {
error = "You didn't enter a username.\n";
}function checkPassword (strng) {
var error = "";
if (strng == "") {
error = "You didn't enter a password.\n";
}
var illegalChars = /[\W_]/; // allow only letters and numbers
if ((strng.length < 6) || (strng.length > 8)) {
error = "The password is the wrong length.\n";
}
else if (illegalChars.test(strng)) {
error = "The password contains illegal characters.\n";
}
function check_str(num)
{
var v_test="0123456789abcdefghijklmnopqrstuvwxyz"; for (i=0;i<num.length;i++)
{
if (v_test.indexOf(num.charAt(i))==-1)
{
return false;
}
}
return true;
}