//Parses out the querystring to check for parameters that are passed in

var ids=new Array('tab_1','tab_2','tab_3');
 
function check_querystring(){
 
 var search = location.search;
 search = search.replace(/\?/,'');
 var searchAttributes = search.split('&');
 var searchequal = search.indexOf('=');
 
 if (searchequal>-1){
 
  for(var no=0;no<searchAttributes.length;no++){
   var items = searchAttributes[no].split('=');
   eval("var "+items[0]+" = '"+items[1]+"';");
  }
 
   if(tabId){
    switchid(tabId)
   }
    } else {
 
     switchid('tab_1')
 
  }  
}
 
//==============================================
 
function switchid(id){
 
 hideallids();
 showdiv(id);
}
 
function hideallids(){
 //loop through the array and hide each element by id
 for (var i=0;i<ids.length;i++){
  hidediv(ids[i]);
 }    
}
 
function hidediv(id) {
 //safe function to hide an element with a specified id
 if (document.getElementById) { // DOM3 = IE5, NS6
  document.getElementById(id).style.display = 'none';
 }
 else {
  if (document.layers) { // Netscape 4
   document.id.display = 'none';
  }
  else { // IE 4
   document.all.id.style.display = 'none';
  }
 }
}
 
function showdiv(id) {
 //safe function to show an element with a specified id
    
 if (document.getElementById) { // DOM3 = IE5, NS6
  document.getElementById(id).style.display = 'block';
 
 }
 else {
  if (document.layers) { // Netscape 4
   document.id.display = 'block';
  }
  else { // IE 4
   document.all.id.style.display = 'block';
  }
 }
}