// JavaScript Document

function openCloseDiv(divo,divc){
    var div_o=document.getElementById(divo);
    var div_c=document.getElementById(divc);
    
    div_o.style.display="";
    div_c.style.display="none";
    
    return false;
}

function advance(me,amt,nxt,e){
	if(window.event && e.keyCode == "0x08")return true;
	if(e.which && e.keyCode == "0x08")return true;
	
  if(me.value.length==amt){
    document.getElementById(nxt).focus();
  }
}

function isInt(num) {
return (num.toString().search(/^[0-9]+$/) == 0);
}

function updatephone(refer){
  var areacode=document.getElementById('ac');
  if(!isInt(areacode.value)){
    areacode.value="";
    return false;
  }
    var threeDig=document.getElementById('exchange');
    if(!isInt(threeDig.value) && threeDig.value!=""){
      threeDig.value="";
      return false;
    }
    var fourDig=document.getElementById('dig4');
    if(!isInt(fourDig.value)&&fourDig.value!=""){
      fourDig.value="";
      return false;
    }
  var phone = document.getElementById('phone');
  phone.value="("+areacode.value+")"+threeDig.value+"-"+fourDig.value;

}