function imgch(mHref,mSrc){
	var myHref = mHref;
	var mySrc = mSrc;
	if($("#index_main_imglink img").attr("src")!==mSrc){
		$("#index_main_imglink").attr("href",mHref);
		$("#index_main_imglink img").attr("src",mSrc);
//		$("#effect_box").slideUp("fast",function(){$("#index_main_imglink img").attr("src",mSrc)});
//		$("#effect_box").slideDown("fast");
	}
};