function checkform() { contactperson=document.f1.contactperson.value; yourmobile=document.f1.yourmobile.value; youremail=document.f1.youremail.value; yourcity=document.f1.yourcity.value; add_details=document.f1.add_details.value; if (contactperson=="") { alert("Contact Person cannot be empty"); document.f1.contactperson.focus(); return; } if (yourmobile=="") { alert("Mobile Number cannot be empty"); document.f1.yourmobile.focus(); return; } if (youremail=="") { alert("Please type your email addresss"); document.f1.youremail.focus(); return; } if (yourcity=="") { alert("Enter your city"); document.f1.yourcity.focus(); return; } if (add_details=="") { alert("Enter your query"); document.f1.add_details.focus(); return; } document.f1.submit(); } document.write('');