// chuyen FLAG cac ngon ngu Anh,Phap,Duc ..
function flagLang(IDLang){
	var url = document.location.href;
	var lastDot = url.lastIndexOf('.');
	var path = url.substring(lastDot,-4); //cat duoi .php
	var lastUnderline = url.lastIndexOf('_');
	var fr = url.indexOf('fr');
	var de = url.indexOf('de');
	var lastDash = url.lastIndexOf('/');

	if(IDLang == 'en'){ //bat co EN
		if(lastDash == (url.length-1)){ //chua nhan index.php
			fwd = url+'index.php';
		}else{ //da nhan duong dan day du
			if(lastUnderline == -1){ //trang EN default
			fwd = path+'.php';
			}else if(lastUnderline != -1){ //trang FR hoac DE
			fwd = path.substring(lastUnderline,-3)+'.php';
			}
		}
				
	}else if(IDLang == 'fr'){ // bat co FR
		if(lastDash == (url.length-1)){ //chua nhan index.php
			fwd = url+'index_fr.php';
		}else{ //da nhan duong dan day du
			if(lastUnderline == -1){ //trang EN default
			fwd = path+'_fr.php';
			}else if(lastUnderline != -1){ //trang FR hoac DE
				if(fr != -1){
					fwd = path+'.php';
				}else if(de != -1){
					fwd = path.substring(lastUnderline,-3)+'_fr.php';
				}
			}
		}	
		
	}else if(IDLang == 'de'){ // bat co DE
		if(lastDash == (url.length-1)){ //chua nhan index.php
			fwd = url+'index_de.php';
		}else{ //da nhan duong dan day du
			if(lastUnderline == -1){ //trang EN default
			fwd = path+'_de.php';
			}else if(lastUnderline != -1){ //trang FR hoac DE
				if(fr != -1){
					fwd = path.substring(lastUnderline,-3)+'_de.php';
				}else if(de != -1){
					fwd = path+'.php';
				}
			}
		}		
	}

	document.getElementById(IDLang).href= fwd; //chuyen huong URL
	
}//end function flagLang()

// popWindow
var extend = '';
function popWindow(path){ // path = name of document htm or pdf
	extend = path.substring(path.lastIndexOf(".")+1);
	if(extend == 'pdf'){
		winPop = window.open('pdf_files/'+path,'cuaso','width=800,height=500,scrollbars,toolbar,location,status,resizable');
	}else if(extend == 'htm'){
		winPop = window.open('document_files/'+path,'cuaso','width=800,height=500,scrollbars,toolbar,location,status,resizable');
	}
	winPop.focus();
	//return false;
	}	

//selected Menu
initMenu = function(){    
    var url = this.location.href;
	var flag = document.getElementById('flag').getElementsByTagName('a');
    var menu = document.getElementById('menu').getElementsByTagName('a');
	
	for( var x = 0; x < flag.length ; x++ ){
        if (flag[x].href == url) {flag[x].className = 'blue';}
      }     
	for( var y = 0; y < menu.length ; y++ ){
        if (menu[y].href == url) {menu[y].className = 'yellow';}
      }
}

if(window.addEventListener){
    window.addEventListener('load', initMenu, false);
}else if(window.attachEvent){
    window.attachEvent("onload", initMenu);
}