function checkForm() {
if (document.frmemailsup.subject.selectedIndex==0) {
    alert("Please select a subject."); 
    document.frmemailsup.subject.focus(); 
    return false; 
}
if ((document.frmemailsup.email.value.indexOf('@') == -1) || (document.frmemailsup.email.value.indexOf('.') == -1)) {
    alert("You must enter a valid email address.");
     document.frmemailsup.email.focus();
    return false;
}
if (document.frmemailsup.name.value.length < 3) {
    alert("Please fill out your name."); 
    document.frmemailsup.name.focus(); 
    return false; 
}
if (document.frmemailsup.shelterID.value.length < 3) {
    alert("Please fill out your shelter ID."); 
    document.frmemailsup.shelterID.focus(); 
    return false; 
}
if (document.frmemailsup.message.value.length < 3) {
    alert("Please enter your message."); 
    document.frmemailsup.message.focus(); 
    return false; 
}
return true;
}