window.onload=changeMessage;

function changeMessage()
{
if(navigator.platform.indexOf("Win") > -1 && navigator.appName == "Microsoft Internet Explorer")
{
document.getElementById("targ").innerHTML = "Save Target As";
}

if(navigator.platform.indexOf("Win") > -1 && navigator.appName == "Netscape")
{
document.getElementById("targ").innerHTML = "Save Link As";
}

if(navigator.appVersion.indexOf("Mac") > -1 && navigator.appName == "Netscape")
{
document.getElementById("targ").innerHTML = "Download Linked File";
}

}