function getSelectCheckedValue(selectName){
	var i = 0;
	var select = document.getElementById(selectName);
	for(; i < select.options.length ; i = i + 1){
		if( select.options[i].selected ){
			return select.options[i].value;
		}
	}
	if( i == select.options.length ){
	 	return "";
	}		
}

function getSelectCheckedText(selectName){
	var i = 0;
	var select = document.getElementById(selectName);
	for(; i < select.options.length ; i = i + 1){
		if( select.options[i].selected ){
			return select.options[i].text;
		}
	}
	if( i == select.options.length ){
	 	return "";
	}		
}

function checkedSelectByValue(selectName, value){
	var i = 0;
	var select = document.getElementById(selectName);
	for(i = 0 ; i < select.options.length ; i = i + 1){
		if( select.options[i].value == value ){
			select.options[i].selected = true;
		}
	}
}

	function deleteOptions(selectName){
		var select = document.getElementById(selectName);
		var pos = select.selectedIndex;
		while(pos != -1){
			select.options[pos] = null;
			pos = select.selectedIndex;
		}
	}
	
	function deleteAllOptions(selectName){
		var select = document.getElementById(selectName);
		for(var pos = select.options.length - 1; pos >= 0 ; pos--){
			select.options[pos] = null;
		}
	}

	function addOption(selectName, pos, value, text){
		var select = document.getElementById(selectName);
		if(pos >= select.options.length ){ pos = select.options.length;}
		if(pos < 0){ pos = 0;}
		var duplicated = false;
		for( var j = 0; j < select.options.length ; j = j + 1){
			if(value == select.options[j].value){
				duplicated = true;
				break;
			}
		}
		if(duplicated){		
			return;
		}else{
			for( var i = select.options.length - 1 ; i >= pos ; i = i - 1 ){
				select.options[i + 1] = new Option(select.options[i].text, select.options[i].value);
			}
		}
		select.options[pos] = new Option(text, value);
		select.selectedIndex = pos;
	}
						
	function moveOption(selectName ,up) {
		var select = document.getElementById(selectName);
		var pos = select.selectedIndex;
		if (pos == -1){ 
			return;
		}else {
			var nextPos = pos + ( up ? -1 : 1);
			if (nextPos < 0){ nextPos = 0;	}
			if (nextPos >= select.options.length){ nextPos = select.options.length - 1;	}
									  	
			var oldVal = select.options[pos].value;
			var oldText = select.options[pos].text;								
			select.options[pos].value = select.options[nextPos].value;
			select.options[pos].text = select.options[nextPos].text;
			select.options[nextPos].value = oldVal;
			select.options[nextPos].text = oldText;
										
			if (up){
				select.selectedIndex = nextPos;
			}else{ 
				select.selectedIndex = nextPos;
			}
		}
	}

	function transverseSelectedOptions(selectNameFrom, selectNameTo){
		var i = 0;				
		var select = document.getElementById(selectNameFrom);
		var len = select.options.length;
		for(; i < select.options.length ; i = i + 1){
			if( select.options[i].selected && select.options[i].value != ""){
				addOption(selectNameTo, len, select.options[i].value, select.options[i].text);
				select.options[i].selected = false;
			}
		}				
	}
	
	function check_optionChange(selectNameHost, selectNameCust, optionArrayHost, optionArrayKey, optionArrayText){
		var sl2 = document.getElementById(selectNameCust);
		
		var k = 1;
		sl2.options.length = k;
		var hostValue = getSelectCheckedValue(selectNameHost);
		if(hostValue == ""){					
			return;
		}
		
		for(var i = 0 ; i < optionArrayHost.length ; i++){
			if(hostValue == optionArrayHost[i]){
				sl2.options[k] = new Option(optionArrayText[i], optionArrayKey[i]);
				k++;
			}
		}
	}
	
	function collectMultipleSelect(selectName, textFieldName){
		document.getElementById(textFieldName).value = "";
		var tmp = "";
		var select = document.getElementById(selectName);
		for (var i = 0; i < select.options.length; i = i + 1) {
			if(tmp != ""){
				tmp = tmp + ",";
			} 
			tmp = tmp + select.options[i].value;
		}
		document.getElementById(textFieldName).value = tmp;
	}