function id(i){
	return (document.getElementById)? document.getElementById(i) : document.all[i];
}

function CheckC()

{

	if (feedback.msg.value=="")

	{
        alert("The commentary content cannot for spatial!");

		feedback.msg.focus();

		return false;

	}


}


/* 无文字链隐藏桔黄背景 */
function ctrlWadBg(){
	if( id("adwad").getElementsByTagName("A").length == 0 ){
		id("adwad").style.display = "none";
	}
}

/* 排行榜补充样式  最多显示7条*/
function setRank(r){
	var ark = document.getElementById(r);
	var lis = ark.getElementsByTagName("li");
	var lisLength = 7;
	if(lis.length < 7) lisLength = lis.length;
	for(i=0;i<lisLength;i++){
		if(i<3){
			lis[i].innerHTML = "<b class=\"r"+(i+1)+"\">"+(i+1)+"<\/b> " + lis[i].innerHTML;
		}else{
			lis[i].innerHTML = "<b class=\"rn\">"+(i+1)+"<\/b> " + lis[i].innerHTML;
		}
	}
	if( lis.length > 7 ) {
		for(i=7;i<lis.length;i++){
			lis[i].style.display = "none";
		}
	}
		
}
setRank("artrank_1");
setRank("artrank_2");
setRank("artrank_3");

function doZoom(size){
	id("artibody").style.fontSize = size + "px";
	id("artibody").style.lineHeight = (size*2-3) + "px"; 
	
}
/* 标签切换 */
function tabSwitch(t,i,on,off){
	var c = t.parentNode.id;
	if(t.className == on) return ;
	var lis = t.parentNode.getElementsByTagName("li");
	for(var j = 0;j<lis.length;j++){
		if(j==(i-1)){
			id(c+"_"+i).className = "";
			lis[j].className=on;
		}else{
			id(c+"_"+(j+1)).className = "hide";
			lis[j].className=off;
		}
	}
}