<!-- This code makes the jump from textbox one to textbox two -->
	function check_tab1(){
		var letters = document.contact.phone1_tab.value.length +1;
		if (letters <= 3){
			document.contact.phone1_tab.focus()
		}else{
			document.contact.phone2_tab.focus()
		}
	}
	
	<!-- This code makes the jump from textbox two to text box three -->
	function check_tab2(){
		var letters = document.contact.phone2_tab.value.length +1;
		if (letters <= 3){
			document.contact.phone2_tab.focus()
		}else{
			document.contact.phone3_tab.focus()
		}
	}