function validate(form) { 
    if (form.firstName.value.length == 0) 
    { 
        alert("Please enter your first name.") 
        form.firstName.focus() 
        return false 
    } 

    if (form.lastName.value.length == 0) 
    { 
        alert("Please enter your last name.") 
        form.lastName.focus() 
        return false 
    } 

   	if (form.company.value.length == 0) 
    { 
        alert("Please enter the name of your company.") 
        form.company.focus() 
        return false 
    }
	
	 if (form.email.value.length == 0) 
    { 
        alert("Please enter your e-mail address.") 
        form.email.focus() 
        return false 
    } 

    if (form.email.value.indexOf("@") == -1) 
    { 
        alert("Please enter a valid e-mail address."); 
        form.email.focus(); 
        return false; 
    }	 	 
}