function validate() { if(document.Enquiry.ContactName.value==""){ alert('Please enter your name.'); document.Enquiry.ContactName.focus() return false; } if(document.Enquiry.Company.value==""){ alert('Please enter the name of your company.'); document.Enquiry.Company.focus() return false; } if((document.Enquiry.Email.value.indexOf(".") < 2) + (document.Enquiry.Email.value.indexOf("@") < 1)){ alert('Please enter a valid email address.'); document.Enquiry.Email.focus() return false; } if(document.Enquiry.Telephone.value==""){ alert('Please enter your telephone number.'); document.Enquiry.Telephone.focus() return false; } return true; }