<!--
function changework(obj){
	document.getElementById("js").style.backgroundImage="url(images/work_Lfocu.gif)";
	document.getElementById("ye").style.backgroundImage="url(images/work_Lfocu.gif)";
	document.getElementById("xn").style.backgroundImage="url(images/work_Lfocu.gif)";
	document.getElementById("ln").style.backgroundImage="url(images/work_Lfocu.gif)";
	obj.style.backgroundImage="url(images/work_focu.gif)";
	document.getElementById("w_js").style.display="none";
	document.getElementById("w_ye").style.display="none";
	document.getElementById("w_xn").style.display="none";
	document.getElementById("w_ln").style.display="none";
	document.getElementById("w_"+obj.id).style.display="block";
}
//-->