function backToTop() {
  var x1 = x2 = x3 = 0;
  var y1 = y2 = y3 = 0;
  if (document.documentElement) {
      x1 = document.documentElement.scrollLeft || 0;
      y1 = document.documentElement.scrollTop || 0;
  }
  if (document.body) {
      x2 = document.body.scrollLeft || 0;
      y2 = document.body.scrollTop || 0;
  }
  x3 = window.scrollX || 0;
  y3 = window.scrollY || 0;
  var x = Math.max(x1, Math.max(x2, x3));
  var y = Math.max(y1, Math.max(y2, y3));
  window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));
  if (x > 0 || y > 0) {
      window.setTimeout("backToTop()", 25);
  }
}

function buttonDiabled(id,bName){

	var fun = $('fun_'+id);
	var imp = $('imp_'+id);
	var fear = $('fear_'+id);
	var conbini = $('conbini_'+id);
	var sad = $('sad_'+id);
	var del = $('del_'+id);

	fun.disabled = true;
	imp.disabled = true;
	fear.disabled = true;
	conbini.disabled = true;
	sad.disabled = true;
	del.disabled = true;

	Element.removeClassName(fun,'icon01');
	Element.removeClassName(imp,'icon02');
	Element.removeClassName(fear,'icon03');
	Element.removeClassName(conbini,'icon04');
	Element.removeClassName(sad,'icon05');
	Element.removeClassName(del,'icon06');
	
	Element.addClassName(fun,'icon01off');
	Element.addClassName(imp,'icon02off');
	Element.addClassName(fear,'icon03off');
	Element.addClassName(conbini,'icon04off');
	Element.addClassName(sad,'icon05off');
	Element.addClassName(del,'icon06off');

	switch(bName){
		case "fun":
			Element.removeClassName(fun,'icon01off');
			Element.addClassName(fun,'icon01on');
			break;
		case "imp":
			Element.removeClassName(imp,'icon02off');
			Element.addClassName(imp,'icon02on');
			break;
		case "fear":
			Element.removeClassName(fear,'icon03off');
			Element.addClassName(fear,'icon03on');
			break;
		case "conbini":
			Element.removeClassName(conbini,'icon04off');
			Element.addClassName(conbini,'icon04on');
			break;
		case "sad":
			Element.removeClassName(sad,'icon05off');
			Element.addClassName(sad,'icon05on');
			break;
		case "del":
			Element.removeClassName(del,'icon06off');
			Element.addClassName(del,'icon06on');
			break;
	}
}



//文字サイズ大用ファンクション
function setLarge(){
  Element.setStyle('contribute-box', 
  { 
	"height" : "1000px"
  });
}
//文字サイズ中ファンクション
function setMid(){
  Element.setStyle('contribute-box', 
  { 
	"height" : "500px"
  });
}
//文字サイズ小ファンクション
function setSmall(){
  Element.setStyle('contribute-box', 
  { 
	"height" : "300px"
  });
}