function switchmodTag(modtag) {
		if (modtag == 'mod1') {
		//	alert(modtag);
			document.getElementById('mod1').className = "menuOn";
			document.getElementById('trafficSearch').style.display = 'block';
			document.getElementById('mod2').className = "menuOff";
			document.getElementById('trsSearch').style.display = 'none';
		} else {
			document.getElementById('mod2').className = "menuOn";
			document.getElementById('trsSearch').style.display = 'block';
			document.getElementById('mod1').className = "menuOff";
			document.getElementById('trafficSearch').style.display = 'none';
		}

}
function selchange(ope) {
	for ( var i = 1; i <= 3; i++) {
		document.getElementById('list' + i).style.display = 'none';
	}
	document.getElementById('list' + ope).style.display = 'block';
}
function changeNavBG(obj){
	//alert(obj);
	var tableCon=document.getElementById("tab_nav");
	var tdList=tableCon.getElementsByTagName("a");
	for(var i=0;i<tdList.length;i++){
		tdList[i].className="tab_df";
		tdList[i].style.color="#000000";
	}
	obj.className="tab_li";
	obj.style.color="#ffffff";
}