//元素名称：m_n; tab_m_n
//count:交换的个数
function showtab(m,n,count){
	for(var i=1;i<=count;i++){
		if (i==n){			
			getObject("td_"+m+"_"+i).className="cur";
			getObject("tab_"+m+"_"+i).className="show";
			}
		else {
			getObject("td_"+m+"_"+i).className="ucur";
			getObject("tab_"+m+"_"+i).className="hidden";
			}
	}
}
function showcitytab(m,n,count)
{
	for(var i=1;i<=count;i++){
		if (i==n){
			if(i==1)
			{
				getObject("td_"+m+"_"+i).className="current first";
			}
			else
			{
				getObject("td_"+m+"_"+i).className="current";
				
			}
			getObject("tab_"+m+"_"+i).className="show";
			}
		else {
			if(i==1)
			{
				getObject("td_"+m+"_"+i).className="normal first";	
			}
			else
			{
				getObject("td_"+m+"_"+i).className="normal";
			}
			getObject("tab_"+m+"_"+i).className="hidden";
			}
	}
}
function getObject(objectId) {
	if(document.getElementById && document.getElementById(objectId)) {
	// W3C DOM
	return document.getElementById(objectId);
	} else if (document.all && document.all(objectId)) {
	// MSIE 4 DOM
	return document.all(objectId);
	} else if (document.layers && document.layers[objectId]) {
	// NN 4 DOM.. note: this won't find nested layers
	return document.layers[objectId];
	} else {
	return false;
	}	
}