コード
function getLinks(){
var app = window.navigator.appName.charAt(0);
var ver = window.navigator.appVersion.charAt(0);
var lnk = window.document.links;
var ank = window.document.anchors;
var tmp;
var text = "";
for (cnt = 0; cnt < lnk.length; cnt++) {
tmp = "";
if (app == "N" && ver >= 4) {
tmp = lnk[cnt].text;
} else if (app == "M" && ver >= 4) {
tmp = lnk[cnt].innerText;
}
if (tmp == null || tmp == "") { tmp = ank[cnt].name; }
text += tmp + "\n";
}
window.alert(text);
}
<FORM>
<INPUT type="button" value="リンク表示" onClick="getLinks();">
</FORM>