window.onload = function(){

	var songChooserForm = document.getElementById("songChooserForm");

	var selects = songChooserForm.getElementsByTagName("select");
	var numSelects = selects.length;
  
	for(i = 0; i < numSelects; i++){
		
		selects[i].onchange = function(){ songChooserForm.submit(); };
	}
	
	var inputs = songChooserForm.getElementsByTagName("input");
	var numInputs = inputs.length;
  
	for(i = 0; i < numInputs; i++){
		
		if(inputs[i].type == "checkbox"){
			inputs[i].onclick = function(){ songChooserForm.submit(); };
		}
	}
}

function goback(){

	history.go(-1);
}