function observe(target, type, listener) {
    if (target.addEventListener) target.addEventListener(type, listener, false);
    else if (target.attachEvent) target.attachEvent('on' + type, function() { listener.call(target, window.event); });
    else target['on' + type] = function(e) { listener.call(target, e || window.event); };
}

function overSet(){
	if(this.src.match('_o')){
		this.src = this.src.replace('_o','');
	}else{
		this.src = this.src.replace('\.png','_o\.png');
		this.src = this.src.replace('\.jpg','_o\.jpg');
		this.src = this.src.replace('\.jpeg','_o\.jpeg');
		this.src = this.src.replace('\.gif','_o\.gif');
	}
}

function outSet(){
    this.src = this.src.replace('_o','');
}

function naviSet(navi){
	if(document.getElementById(navi)){
		observe(document.getElementById(navi), 'mouseover', overSet);
		observe(document.getElementById(navi), 'mouseout', outSet);
	}
}

window.onload = function(){
	naviSet("navi0");
	naviSet("navi1");
	naviSet("navi2");
	naviSet("navi3");
	naviSet("navi4");
	naviSet("navi5");
}

function mokuteki(tx){
	if(tx == 'その他'){
		document.getElementById("mokutekiti2").style.display = 'block';
		document.getElementById("mokutekiti1").style.display = 'none';
	}else if(tx == 'ゴルフ片道' || tx == 'ゴルフ貸切り'){
		document.getElementById("mokutekiti1").style.display = 'block';
		document.getElementById("mokutekiti2").style.display = 'none';
	}else{
		document.getElementById("mokutekiti1").style.display = 'none';
		document.getElementById("mokutekiti2").style.display = 'none';
	}
}

function daisha(cv){
	if(cv.value == '必要'){
		document.getElementById("daishaset").style.display = 'block';
	}else{
		document.getElementById("daishaset").style.display = 'none';
	}
}

function kaigai(ds){
	if(ds.value == '要'){
		document.getElementById("kaigaiset1").style.display = 'table-row';
		document.getElementById("kaigaiset2").style.display = 'table-row';
		document.getElementById("kaigaiset3").style.display = 'table-row';
	}else{
		document.getElementById("kaigaiset1").style.display = 'none';
		document.getElementById("kaigaiset2").style.display = 'none';
		document.getElementById("kaigaiset3").style.display = 'none';
	}
}