error de validacion en web w3c

[lucasmoadr]

estoy validando la siguiente web:
http://www.alquileres.comze.com/alqu...opiedad-2.html

y me tira estos errores, en una funcion javascript

Line 11, Column 57: character "&" is the first character of a delimiter but occurred as data
…pName=="Microsoft Internet Explorer") && (parseInt(navigator.appVersion)>=4)) …
✉
This message may appear in several cases:

You tried to include the "<" character in your page: you should escape it as "&lt;"
You used an unescaped ampersand "&": this may be valid in some contexts, but it is recommended to use "&amp;", which is always safe.
Another possibility is that you forgot to close quotes in a previous tag.
Line 11, Column 58: character "&amp;" is the first character of a delimiter but occurred as data
…pName=="Microsoft Internet Explorer") && (parseInt(navigator.appVersion)>=4)) {
✉
This message may appear in several cases:

You tried to include the "<" character in your page: you should escape it as "&lt;"
You used an unescaped ampersand "&": this may be valid in some contexts, but it is recommended to use "&amp;", which is always safe.
Another possibility is that you forgot to close quotes in a previous tag.

Line 11, Column 57: xmlParseEntityRef: no name
…pName=="Microsoft Internet Explorer") && (parseInt(navigator.appVersion)>=4)) …
✉
Line 11, Column 58: xmlParseEntityRef: no name
…pName=="Microsoft Internet Explorer") && (parseInt(navigator.appVersion)>=4)) {

los otros errores me los da el servidor gratuito, pero se tendrian que ir cuando migre al verdadero servidor la web

[lucasmoadr]

ya lo solucione,

para que valide los caracteres && se debe poner la funcion javascript entre comentarios asi:

<!-- funcion javascript con && //-->

[morior]

Eso te iba a comentar los carácteres tipo ampersand no les gustan a los validadores :)