// <script>

function emailCheck() {
txt=document.usam.email.value;
if (txt.indexOf("@")<3){
alert("Your email address seems wrong. Please"
+" check the prefix and '@' sign.");
return false;
}
if ((txt.indexOf(".com")<5)&&(txt.indexOf(".org")<5)
&&(txt.indexOf(".gov")<5)&&(txt.indexOf(".net")<5)
&&(txt.indexOf(".mil")<5)&&(txt.indexOf(".edu")<5)){
alert("Your email seems wrong. Please"
+" check the suffix for accuracy. (It should include a "
+".com, .edu, .net, .org, .gov or .mil)");
return false;
   }
}