function setCurrent(menuname,menuimg){
	document.getElementById('index_ul').style.left=-9999;
	document.getElementById('about_ul').style.left=-9999;
	document.getElementById('market_ul').style.left=-9999;
	document.getElementById('service_ul').style.left=-9999;
	document.getElementById('cases_ul').style.left=-9999;
	document.getElementById('contact_ul').style.left=-9999;
	document.getElementById(menuname+'_img').src='images/menuover_'+menuimg+'.gif';
	document.getElementById(menuname+'_ul').style.left=0;
}



/*------------ Menu nav 菜單 -------------------------- */

function menuFix() {

	var sfEls = document.getElementById("nav").getElementsByTagName("li");

	for (var i=0; i<sfEls.length; i++) {

		sfEls[i].onmouseover=function() {

		this.className+=(this.className.length>0? " ": "") + "sfhover";

		}

		sfEls[i].onMouseDown=function() {

		this.className+=(this.className.length>0? " ": "") + "sfhover";

		}

		sfEls[i].onMouseUp=function() {

		this.className+=(this.className.length>0? " ": "") + "sfhover";

		}

		sfEls[i].onmouseout=function() {

		this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"), "");

		}

	}

}

window.onload=menuFix;