function DynamicOptionList(){if(arguments.length < 2){alert("Not enough arguments in DynamicOptionList()");}this.target = arguments[0];this.dependencies = new Array();for(var i=1;i<arguments.length;i++){this.dependencies[this.dependencies.length] = arguments[i];}this.form = null;this.dependentValues = new Object();this.defaultValues = new Object();this.options = new Object();this.delimiter = "|";this.longestString = "";this.numberOfOptions = 0;this.addOptions = DynamicOptionList_addOptions;this.populate = DynamicOptionList_populate;this.setDelimiter = DynamicOptionList_setDelimiter;this.setDefaultOption = DynamicOptionList_setDefaultOption;this.printOptions = DynamicOptionList_printOptions;this.init = DynamicOptionList_init;}
function DynamicOptionList_setDelimiter(val){this.delimiter = val;}
function DynamicOptionList_setDefaultOption(condition, val){
	if(typeof this.defaultValues[condition] == "undefined" || this.defaultValues[condition]==null){
		this.defaultValues[condition] = new Object();
	}
	for(var i=1;i<arguments.length;i++){
		this.defaultValues[condition][arguments[i]]=1;
	}
}
function DynamicOptionList_init(theform){this.form = theform;this.populate();}
function DynamicOptionList_addOptions(dependentValue){if(typeof this.options[dependentValue] != "object"){this.options[dependentValue] = new Array();}for(var i=1;i<arguments.length;i+=2){if(arguments[i].length > this.longestString.length){this.longestString = arguments[i];}this.numberOfOptions++;this.options[dependentValue][this.options[dependentValue].length] = arguments[i];this.options[dependentValue][this.options[dependentValue].length] = arguments[i+1];}}
function DynamicOptionList_printOptions(){if((navigator.appName == 'Netscape') &&(parseInt(navigator.appVersion) <= 4)){var ret = "";for(var i=0;i<this.numberOfOptions;i++){ret += "<OPTION>";}ret += "<OPTION>"
for(var i=0;i<this.longestString.length;i++){ret += "_";}document.writeln(ret);}}
function DynamicOptionList_populate(){
	var theform = this.form;
	var i,j,obj,obj2;
	this.dependentValues = new Object;
	var dependentValuesInitialized = false;
	for(i=0;i<this.dependencies.length;i++){
		var sel = theform[this.dependencies[i]];
		var selName = sel.name;
		//alert(selName);
		if(!dependentValuesInitialized){
			dependentValuesInitialized = true;
			for(j=0;j<sel.options.length;j++){
				if(sel.options[j].selected){
					this.dependentValues[sel.options[j].value] = true;
				}
			}
		} else {
			var tmpList = new Object();
			var newList = new Object();
			for(j=0;j<sel.options.length;j++){
				if(sel.options[j].selected){
					tmpList[sel.options[j].value] = true;
				}
			}
			for(obj in this.dependentValues){
				for(obj2 in tmpList){
					newList[obj + this.delimiter + obj2] = true;
				}
			}
			this.dependentValues = newList;
		}
	}
	var targetSel = theform[this.target];
	var targetSelected = new Object();
	for(i=0;i<targetSel.options.length;i++){
		if(targetSel.options[i].selected){
			targetSelected[targetSel.options[i].value] = true;
		}
	}
	targetSel.options.length = 0;
	for(i in this.dependentValues){
		if(typeof this.options[i] == "object"){
			var o = this.options[i];
			for(j=0;j<o.length;j+=2){
				var text = o[j];
				var val = o[j+1];
				targetSel.options[targetSel.options.length] = new Option(text, val, false, false);
				if(typeof this.defaultValues[i] != "undefined" && this.defaultValues[i]!=null){
					for(def in this.defaultValues[i]){
						if(def == val){
							targetSelected[val] = true;
						}
					}
				}
			}
		}
	}
	targetSel.selectedIndex=-1;
	for(i=0;i<targetSel.options.length;i++){
		if(targetSelected[targetSel.options[i].value] != null && targetSelected[targetSel.options[i].value]==true){
			targetSel.options[i].selected = true;
		}
	}
	if (targetSel.options.length == 1){
		targetSel.options[0].selected = true;
	}	
}