function check_eml(cf) {  

//............
if(cf.kidname.value.length < 1){
alert("Name field is empty, please enter your name");
cf.kidname.focus(); // put the prompt in the name field
// if the browser is Netscape 6 or IE
if(document.all || document.getElementByID){
// change the color of text field
cf.kidname.style.background = "yellow";
}
// make sure the form is not submitted
return false;
}
}
//====================================