?? validateminlength.js
字號(hào):
/*$RCSfile: validateMinLength.js,v $ $Revision: 1.11 $ $Date: 2004/03/28 16:53:21 $ */
/**
* A field is considered valid if greater than the specified minimum.
* Fields are not checked if they are disabled.
* <p>
* <strong>Caution:</strong> Using <code>validateMinLength</code> on a password field in a
* login page gives unnecessary information away to hackers. While it only slightly
* weakens security, we suggest using it only when modifying a password.</p>
* @param form The form validation is taking place on.
*/
function validateMinLength(form) {
var isValid = true;
var focusField = null;
var i = 0;
var fields = new Array();
var formName = form.getAttributeNode("name");
oMinLength = eval('new ' + formName.value + '_minlength()');
for (x in oMinLength) {
var field = form[oMinLength[x][0]];
if ((field.type == 'hidden' ||
field.type == 'text' ||
field.type == 'password' ||
field.type == 'textarea') &&
field.disabled == false) {
var iMin = parseInt(oMinLength[x][2]("minlength"));
if ((trim(field.value).length > 0) && (field.value.length < iMin)) {
if (i == 0) {
focusField = field;
}
fields[i++] = oMinLength[x][1];
isValid = false;
}
}
}
if (fields.length > 0) {
focusField.focus();
alert(fields.join('\n'));
}
return isValid;
}
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