function check() {
if(document.checkForm.name.value=="") {
alert("Please enter your Name.") ;
document.checkForm.name.focus() ;
return false ;
}
else if(document.checkForm.email.value=="") {
alert("Please enter your Email Address.") ;
return false ;
}
else if(checkForm.email.value.indexOf('@')==-1) {
alert("Please enter a valid Email Address.") ;
document.checkForm.email.focus() ;
return false ;
}
else if(checkForm.email.value.indexOf('.')==-1) {
alert("Please enter a valid Email Address.") ;
document.checkForm.email.focus() ;
return false ;
}

else if(document.checkForm.subject.value=="") {
alert("Please enter a Subject.") ;
document.checkForm.subject.focus() ;
return false ;
}
else if(document.checkForm.message.value=="") {
alert("Please enter your Message.") ;
document.checkForm.message.focus() ;
return false ;
}
else 
return true ;
}