function switchlng(cur_lng){
	var s = document.URL;
	var url = ""
	
	if ( s.indexOf("applng") >= 0 ) {		
			var s1 = s.split("?");
			var s2 = s1[1];
			var s3 = s2.split("&")			
			
			var i, s4;
			for ( i = 0; i < s3.length; i++) {
				if ( s3[i].indexOf("applng") >=0 ) {
					s4 = s3[i];
					break;
				}
			}
			url = s.replace( s4, "applng=" + cur_lng)
	}
	else {
		if ( s.indexOf("?") >= 0 ) {		
			url = s + "&applng="  + cur_lng;								
		}
		else {
			url = s + "?applng="  + cur_lng;						
		}
	}
	
	window.location = url;	
}