function fnImgZoomOpen(sImgName){
	fnShowDiv('divZoomBack', 'visible');
	fnShowDiv('divZoomImg', 'visible');
	fnShowDiv('divZoomClose', 'visible');
	fnImgChange('divZoomImgFile', 'imgshow/'+sImgName);
}
function fnImgZoomClose(sImgName){
	fnShowDiv('divZoomBack','hidden');
	fnShowDiv('divZoomImg','hidden'); 
	fnShowDiv('divZoomClose', 'hidden');
	fnImgChange('divZoomImgFile', 'imgshow/no.gif');
}
function fnShowDiv(sId, sStyle){
	document.getElementById(sId).style.visibility=sStyle;	
}
function fnImgChange(sId, sFile){
	document.getElementById(sId).src=sFile;
}