<!--
function EwsTab_z(item){
for( var i = 1; i <= 4; i++)
{ //设定选项卡的个数
	if(i==1){
	document.getElementById("Etab_z"+i).style.background="url(images/tabbg.jpg) repeat-x bottom";//默认背景
	document.getElementById("Div_z"+i).style.display="none";
	}
	if(i==2){
	document.getElementById("Etab_z"+i).style.background="url(images/tabbg.jpg) repeat-x bottom";//默认背景
	document.getElementById("Div_z"+i).style.display="none";
	}
	if(i==3){
	document.getElementById("Etab_z"+i).style.background="url(images/tabbg.jpg) repeat-x bottom";//默认背景
	document.getElementById("Div_z"+i).style.display="none";
	}
	if(i==4){
	document.getElementById("Etab_z"+i).style.background="url(images/tabbg.jpg) repeat-x bottom";//默认背景
	document.getElementById("Div_z"+i).style.display="none";
	}
}
	if(item==1){
	document.getElementById("Etab_z"+item).style.background="url(images/tabbgover.jpg) repeat-x bottom";//鼠标覆盖后的背景
	document.getElementById("Div_z"+item).style.display = "block";
	}
	if(item==2){
	document.getElementById("Etab_z"+item).style.background="url(images/tabbgover.jpg) repeat-x bottom";//鼠标覆盖后的背景
	document.getElementById("Div_z"+item).style.display = "block";
	}
	if(item==3){
	document.getElementById("Etab_z"+item).style.background="url(images/tabbgover.jpg) repeat-x bottom";//鼠标覆盖后的背景
	document.getElementById("Div_z"+item).style.display = "block";
	}
	if(item==4){
	document.getElementById("Etab_z"+item).style.background="url(images/tabbgover.jpg) repeat-x bottom";//鼠标覆盖后的背景
	document.getElementById("Div_z"+item).style.display = "block";
	}
}
-->