/* Smooth scrolling
   Changes links that link to other parts of this page to scroll
   smoothly to those links rather than jump to them directly, which
   can be a little disorienting.
   
   sil, http://www.kryogenix.org/
   
   v1.0 2003-11-11
   v1.1 2005-06-16 wrap it up in an object
*/

var ss = {
  fixAllLinks: function() {
    // Get a list of all links in the page
    var allLinks = document.getElementsByTagName('a');
    // Walk through the list
    for (var i=0;i<allLinks.length;i++) {
      var lnk = allLinks[i];
      if ((lnk.href && lnk.href.indexOf('#') != -1) && 
          ( (lnk.pathname == location.pathname) ||
	    ('/'+lnk.pathname == location.pathname) ) && 
          (lnk.search == location.search)) {
        // If the link is internal to the page (begins in #)
        // then attach the smoothScroll function as an onclick
        // event handler
        ss.addEvent(lnk,'click',ss.smoothScroll);
      }
    }
  },

  smoothScroll: function(e) {
    // This is an event handler; get the clicked on element,
    // in a cross-browser fashion
    if (window.event) {
      target = window.event.srcElement;
    } else if (e) {
      target = e.target;
    } else return;

    // Make sure that the target is an element, not a text node
    // within an element
    if (target.nodeName.toLowerCase() != 'a') {
      target = target.parentNode;
    }
  
    // Paranoia; check this is an A tag
    if (target.nodeName.toLowerCase() != 'a') return;
  
    // Find the <a name> tag corresponding to this href
    // First strip off the hash (first character)
    anchor = target.hash.substr(1);
    // Now loop all A tags until we find one with that name
    var allLinks = document.getElementsByTagName('a');
    var destinationLink = null;
    for (var i=0;i<allLinks.length;i++) {
      var lnk = allLinks[i];
      if (lnk.name && (lnk.name == anchor)) {
        destinationLink = lnk;
        break;
      }
    }
    if (!destinationLink) destinationLink = document.getElementById(anchor);

    // If we didn't find a destination, give up and let the browser do
    // its thing
    if (!destinationLink) return true;
  
    // Find the destination's position
    var destx = destinationLink.offsetLeft; 
    var desty = destinationLink.offsetTop;
    var thisNode = destinationLink;
    while (thisNode.offsetParent && 
          (thisNode.offsetParent != document.body)) {
      thisNode = thisNode.offsetParent;
      destx += thisNode.offsetLeft;
      desty += thisNode.offsetTop;
    }
  
    // Stop any current scrolling
    clearInterval(ss.INTERVAL);
  
    cypos = ss.getCurrentYPos();
  
    ss_stepsize = parseInt((desty-cypos)/ss.STEPS);
    ss.INTERVAL =
setInterval('ss.scrollWindow('+ss_stepsize+','+desty+',"'+anchor+'")',10);
  
    // And stop the actual click happening
    if (window.event) {
      window.event.cancelBubble = true;
      window.event.returnValue = false;
    }
    if (e && e.preventDefault && e.stopPropagation) {
      e.preventDefault();
      e.stopPropagation();
    }
  },

  scrollWindow: function(scramount,dest,anchor) {
    wascypos = ss.getCurrentYPos();
    isAbove = (wascypos < dest);
    window.scrollTo(0,wascypos + scramount);
    iscypos = ss.getCurrentYPos();
    isAboveNow = (iscypos < dest);
    if ((isAbove != isAboveNow) || (wascypos == iscypos)) {
      // if we've just scrolled past the destination, or
      // we haven't moved from the last scroll (i.e., we're at the
      // bottom of the page) then scroll exactly to the link
      window.scrollTo(0,dest);
      // cancel the repeating timer
      clearInterval(ss.INTERVAL);
      // and jump to the link directly so the URL's right
      location.hash = anchor;
    }
  },

  getCurrentYPos: function() {
    if (document.body && document.body.scrollTop)
      return document.body.scrollTop;
    if (document.documentElement && document.documentElement.scrollTop)
      return document.documentElement.scrollTop;
    if (window.pageYOffset)
      return window.pageYOffset;
    return 0;
  },

  addEvent: function(elm, evType, fn, useCapture) {
    // addEvent and removeEvent
    // cross-browser event handling for IE5+,  NS6 and Mozilla
    // By Scott Andrew
    if (elm.addEventListener){
      elm.addEventListener(evType, fn, useCapture);
      return true;
    } else if (elm.attachEvent){
      var r = elm.attachEvent("on"+evType, fn);
      return r;
    } else {
      alert("Handler could not be removed");
    }
  } 
}

ss.STEPS = 25;

ss.addEvent(window,"load",ss.fixAllLinks);

/* add */
function getElm(id){
	elm = document.getElementById(id);
	return elm;
}
//採点。
var sumElm1_value = 0;
var check_sum1 = 0;
function check_checked(id){
	nowElm = getElm(id);
	if(nowElm.checked == true){
		check_sum1 = check_sum1 + 1;	
	}else{
		check_sum1--;	
		if(check_sum1 < 0){ check_sum1 =0;}
	}
	sumElm1 = getElm('sum1');
	sumElm1.value = check_sum1*5.5;
}
var sumElm2_value = 0;
var check_sum2 = 0;
function check_checked2(id){
	nowElm = getElm(id);
	if(nowElm.checked == true){
		check_sum2++;	
	}else{
		check_sum2--;
		if(check_sum2 < 0){	 check_sum2 =0;}
	}
	sumElm2 = getElm('sum2');
	sumElm2.value = check_sum2*5.5;
}
var sumElm3_value = 0;
var check_sum3 = 0;
function check_checked3(id){
	nowElm = getElm(id);
	if(nowElm.checked == true){
		check_sum3++;	
	}else{
		check_sum3--;
		if(check_sum3 < 0){ check_sum3 =0;}
	}
	sumElm3 = getElm('sum3');
	sumElm3.value = check_sum3*5.5;
}
//表示切替。//クリックしたらメインに画像を表示する関数(width,height固定)
function chg_disp(num){
	Elm1 = getElm('check01');//きめ
	Elm2 = getElm('check02');//きめ
	Elm3 = getElm('check03');//きめ
	switch(num){
		case '1':
		Elm2.style.display = 'none';
		Elm3.style.display = 'none';
		Elm1.style.display = 'block';
		break;
		case '2':
		Elm1.style.display = 'none';
		Elm3.style.display = 'none';
		Elm2.style.display = 'block';
		break;
		case '3':
		Elm1.style.display = 'none';
		Elm2.style.display = 'none';
		Elm3.style.display = 'block';
		break;
		default:break;
	}
}
function DispshowMain(id){//(表示場所,入れるもの,隠すもの)
	bodyElm = getElm('screen');//表示場所(きめ)
	hiddenElm = getElm('hidden');//隠すもの(きめ)
	showElm = getElm(id);//入れるもの(きめ)
	if(bodyElm.hasChildNodes()){
		while(bodyElm.hasChildNodes()){
			var child = bodyElm.firstChild;
			hiddenElm.appendChild(child);
		}
	}
	bodyElm.appendChild(showElm);
	white100(bodyElm);
}
var lagObj_1;
var lagObj_2;
var LAST = 100;//光らせる際最後表示させるか否か(非表示は0)
function timelag_100(){//光らせる関数(表示用)
	lagObj_1 = setTimeout('timelag_100()',speed);
	if(document.all){
		showElm_1.style.filter = "alpha(opacity="+count+")";
	}else{
		showElm_1.style.opacity  = count*0.01;
	}
	count +=10;
	if(count > 100){
		clearTimeout(lagObj_1);
		count = 0;
		showElm_1.style.filter = "alpha(opacity="+LAST+")";
		showElm_1.style.opacity = LAST*0.01;
	}
}
function timelag_200(){//光らせる関数(非表示用)
	lagObj_2 = setTimeout('timelag_200()',speed);
	if(document.all){
		hidElm.style.filter = "alpha(opacity="+count+")";
	}else{
		hidElm.style.opacity  = count*0.01;
	}
	count -=10;
	if(count < 0){
		clearTimeout(lagObj_2);
		count = 0;
		hidElm.style.filter = "alpha(opacity="+LAST+")";
		hidElm.style.opacity = LAST*0.01;
	}
}
function white100(Elm){//光らせるための下準備関数
	showElm_1 = Elm;
	clearTimeout(lagObj_1);
	count = 0;
	LAST = 100;
	speed=1;
	timelag_100();
}