var oMake = new Object;
	oMake.items = new Array;
	oMake.levels = new Array;
	oMake.additem = addItem;
	oMake.addlevel = addLevel;
	oMake.populate = populateList;
	
	function addItem(level, value) {
	   var pos = oMake.items.length;
	   oMake.items[pos] = new Object;
	   oMake.items[pos].level = level;
	   oMake.items[pos].value = value;
	}
	
	function addLevel(level,depends,repopulate,init) {
	   var pos = oMake.levels.length;
	   oMake.levels[pos] = new Object;
	   oMake.levels[pos].desc = level;
	   oMake.levels[pos].depends = depends;
	   oMake.levels[pos].repopulate = repopulate;
	   oMake.levels[pos].init = init;
	}
	
	function insertOption(list, value, level, select) {
	   var noadd = false;
	   var mvalue;
	   var msel;
	   var len;
	   var i = 1;
	
	   if (level == '0') {
	      for (i; ((i < list.options.length) && (list.options[i].text > value)); i++) {
	      }
	    } else {
	      for (i; ((i < list.options.length) && (list.options[i].text < value)); i++) {
	      }
	    }
	
	   if (i < list.options.length) {
	       if (list.options[i].text > value) {
	           len = list.options.length;
	           for (var j=len; j > i; j--) {
	               mvalue = list.options[j-1].text;
	               msel = list.options[j-1].selected;
	               list.options[j] = new Option(mvalue,mvalue,false,msel);
	           }
	       }
	   }
	
	   list.options[i] = new Option(value,value,false,select);
	}
	
	function populateList(start) {
	   var state;
	   var curlevel;
	   var curvalue;
	   var curlist;
	   var usecheck;
	   var usebranch;
	   var list;
	   var process;
	   var level;
	   var leveldesc;
	   var curleveldesc;
	   var leveldep;
	   var restrict;
	   var depstring;
	   var curdepends;
	   var levelrepop;
	   var leveldefault;
	   var curr;
	
	   curr = GetForm('volvomail');
	   process = false;
	   for (var level=0; level < oMake.levels.length; level++) {      
	       leveldefault = oMake.levels[level].init;
	       leveldesc = oMake.levels[level].desc;
	       if (leveldesc == start) process = true;
	       
	       if (process == true) {
	           usebranch = true;
	           usecheck = oMake.levels.length;
	           leveldep = oMake.levels[level].depends;
	           levelrepop = oMake.levels[level].repopulate;
	
	          var strlevel;
	          switch (leveldep.toLowerCase())
	          {
	          case 'vehicletype':  
	                strlevel = 'Vehicle Type';
	                break;
	          case 'cabstyle':
	                strlevel = 'Cab Style';
	                break;
	          default:
	                strlevel = leveldep;
	                break;
	          }
	           depstring = 'Select a ' + strlevel + ' first';
	           
	           list = curr[leveldesc];
	           switch(leveldep) {
	               case '':
	                   restrict = 'none';
	                   break;
	               case 'nodisplay':
	                   restrict = 'nodisplay';
	                   break;
	               default:
	                   deplist = curr[leveldep];
	                   if (deplist.options[deplist.selectedIndex].value == '') {
	                       restrict = 'noselect';
	                   } else {
	                       restrict = 'none';
	                   }
	                   break;
	           }
	
	           switch(restrict) {
	               case 'noselect':
	                   list.options.length = 0;
	                   list.options[0] = new Option(depstring,'',false,true);
	                   list.selectedIndex = 0; 
	   //Required For NS Browser
	                   break;
	
	               case 'none':
	                   state = leveldefault;
	                   if ((list.options.length > 0) && (levelrepop == false))
	                       state = list.options[list.selectedIndex].text;
	
	                   list.options.length = 0;
	                   list.options[list.options.length] = new Option('Select...','',true,true);
	                   for (var i=0; i < oMake.items.length; i++) {
	                       curlevel = oMake.items[i].level;
	                       if(oMake.levels[curlevel]){
				       curleveldesc = oMake.levels[curlevel].desc;
				       curdepends = oMake.levels[curlevel].depends;
				       if (curdepends != 'nodisplay') {
					   curvalue = oMake.items[i].value;
					   curlist = curr[curleveldesc];
					   if (curlist.options.length == 0) {
					       usebranch = true;
					   } else {
					       if (curlist.selectedIndex < 0) {
						    curlist.selectedIndex = '0';
					       }
					       if ((curlist.options[curlist.selectedIndex].text == 'Select...') || (curlist.options[curlist.selectedIndex].text == curvalue)) {
						   if (usecheck == curlevel) {
						       usebranch = true;
						   }
					       } else {
						   if (((usebranch == true) || (usecheck > curlevel)) && (curlevel < level)) {
						       usebranch = false;
						       usecheck = curlevel;
						   }
					       }
					   }

					   if ((curlevel == level) && (usebranch == true))
					       insertOption(list,curvalue,curlevel,(curvalue == state));
				       }
				}
	                   }
                        list.selectedIndex = 0; 
			 //Required For NS Browser 	                   
	                   break;
	
	               default:
	                   break;
	           }
	       }
	       oMake.levels[level].init = '';
	   }
	}