function check_email(e) { ok = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM"; for(i=0; i < e.length ;i++){ if(ok.indexOf(e.charAt(i)) < 0){ return (false); } } if (document.images) { re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/; re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/; if (!e.match(re) && e.match(re_two)) { return (-1); }}} function check_eml(eml) { // eml is the form (passed using the this keyword) if(eml.First_name.value.length < 1){ alert("Name field is empty, please enter your name"); eml.First_name.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 eml.First_name.style.background = "yellow"; } // make sure the form is not submitted return false; } if(eml.Last_name.value.length < 2){ alert("Last Name field is empty, please enter your surname"); eml.Last_name.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 eml.Last_name.style.background = "yellow"; } // make sure the form is not submitted return false; } // check the first email address ( the exclamation means "not" ) if(!check_email(eml.email.value)){ alert("Invalid email detected"); eml.email.focus(); // if the browser is Netscape 6 or IE if(document.all || document.getElementByID){ // change the color of text field eml.email.style.background = "yellow"; } // make sure the form is not submitted return false; } } // End -->