var gobabygo = true;

function CheckFields(){


if (document.form1.firstname.value == "")   //if 1
{
alert("You must enter your first name.");
    document.form1.firstname.focus();
    gobabygo = false;
}
else {

	if (document.form1.surname.value == "")   //if 2
	{
	alert("You must enter your surname.");
	    document.form1.surname.focus();
	    gobabygo = false;
	}
	else {


	//this is a comment
           //you didn't expect any help did you?

		if (document.form1.phone1.value != "")
		{gobabygo = true}

		else{

			if (document.form1.phone2.value !="") 
			{gobabygo = true}

			else{

				if (document.form1.phone3.value !="")
				{gobabygo = true}
				else
				{
					alert("Please enter a telephone number.");
					document.form1.phone1.focus();
				    	gobabygo = false;
				}
			}			
		}
	//

	} //end 
if (gobabygo == true)
{

document.form1.submit()
}
} //end 

}