window.onload = function() {
	var child;
if (document.getElementsByTagName) {
	var dir ="image/all/"; //画像のディレクトリ
	var strOver  = RegExp("\_r");
	var myMenu = document.getElementById("menu").getElementsByTagName("a");
	var HrefList = new Array();
	if( document.getElementById("event")) child = "../";
	else child="";
	for (var i = 0; i <myMenu.length; i++) {
			myMenu[i].onmouseover =function() {
				var Src = FilePass(this.firstChild.getAttributeNode("src").value);
				var Pass = Src.split(".")
				this.firstChild.src = Src.replace(Src, child+dir+Pass[0]+'_r.'+Pass[1]);
			}
			myMenu[i].onmouseout =function() {
				this.firstChild.src = this.firstChild.src.replace(strOver,'');
			}
		}
	}
}
function FilePass(str){
		var FilePass = str.substring(str.lastIndexOf("/")+1,str.length);
		return FilePass;
}