function getStyleObject(objectId) {
  // checkW3C DOM, then MSIE 4, then NN 4.
  //
  if(document.getElementById && document.getElementById(objectId)) {
	return document.getElementById(objectId).style;
   }
   else if (document.all && document.all(objectId)) {  
	return document.all(objectId).style;
   } 
   else if (document.layers && document.layers[objectId]) { 
	return document.layers[objectId];
   } else {
	return false;
   }
}

function hideAll()
{
  MM_changeProp('commercial','','style.display','none');
  MM_changeProp('church','','style.display','none');
  MM_changeProp('school','','style.display','none');
  MM_changeProp('specialty','','style.display','none');
  MM_changeProp('standard','','style.display','none');
}

function switchUp()
{
	x = document.getElementById('bus-type').selectedIndex;
	if (x == 1)
	{
		hideAll();
		MM_changeProp('commercial','','style.display','block');
		MM_changeProp('standard','','style.display','block');
	} else if (x == 2)
	{
		hideAll();
		MM_changeProp('church','','style.display','block');
		MM_changeProp('standard','','style.display','block');
	} else if (x == 3)
	{
		hideAll();
		MM_changeProp('school','','style.display','block');
		MM_changeProp('standard','','style.display','block');
	} else if (x == 4)
	{
		hideAll();
		MM_changeProp('specialty','','style.display','block');
		MM_changeProp('standard','','style.display','block');
	}
}

function changeDiv(the_div,the_change)
{
  var the_style = getStyleObject(the_div);
  if (the_style != false)
  {
    the_style.display = the_change;
  }
}

function MM_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
  } if (errors) alert('The following error(s) occurred:\n'+errors);
  document.MM_returnValue = (errors == '');
}