var xmlDoc;
// code for IE
if (window.ActiveXObject)
{
xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
}
// code for Mozilla, Firefox, Opera, etc.
else if (document.implementation.createDocument)
{
xmlDoc=document.implementation.createDocument("","",null);
}
else
{
alert('Your browser cannot handle this script');
}

xmlDoc.async=false;
xmlDoc.load("SchoolList.xml");
var x=xmlDoc.getElementsByTagName("Number");
var y=xmlDoc.getElementsByTagName("schoolname");

function namefromnumber(schoolNum)
{
for (i=0;i<x.length;i++)
  { 
  if ((x[i].childNodes[0].nodeValue) == schoolNum)
    {
    var name=(y[i].childNodes[0].nodeValue);
    return name;
    }  
  }
}