function opensub(area) {
if(document.getElementById(area).style.display=='block'){
document.getElementById(area).style.display='none';
}
else{
document.getElementById(area).style.display='block';
}
return false;
}

//=============================================
// changeimg
//=============================================

function changeimg(imgname) {
	document.getElementById("topimg").src=imgname;
}

// addEvent
function addEvent(b,a,c){try{b.addEventListener(a,c,false);}catch(d){b.attachEvent("on"+a,function(){c.apply(b);});}}

// SearchInputValue
function searchInputValue(){
	if(!document.getElementById("ctLeft")) return false;
	var ctLeft = document.getElementById("ctLeft");
	var ctForm = ctLeft.getElementsByTagName("form")[0];
	var searchInput = ctForm.getElementsByTagName("input")[0];
	var sIValue = searchInput.value;
	addEvent(searchInput,"focus",function(){
		this.value = this.value==sIValue ? "" : this.value;
	});
	addEvent(searchInput,"blur",function(){
		this.value = (this.value!=sIValue && this.value.length>0) ? this.value : sIValue;
	});
}
addEvent(window,"load",searchInputValue);