function $(id) { return document.getElementById(id); }

function CheckAll(myform){	
	var strCBValue = "";
	for (var i=0;i<myform.elements.length;i++){  //用来历遍form中所有控件,
		var e = myform.elements[i];
		if(e.type=="checkbox"){					//当是checkbox时才执行下面
			e.checked = !e.checked;
			if(e.checked){						//当是checkbox被选取时才执行下面
				strCBValue = strCBValue+"id=" + e.value+"&amp;";
			}
		}
	}
}

function CheckAllno(myform){	
	var strCBValue = "";
	for (var i=0;i<myform.elements.length;i++){  //用来历遍form中所有控件,
		var e = myform.elements[i];
		if(e.type=="checkbox"){					//当是checkbox时才执行下面
			e.checked = false;
		}
	}
}

function CheckPlay(form){
	var j=0;
	var k=form.elements.length;
	if (k>100){k=100}
	var v = [];
	 for (var i=0;i < k;i++){
		var e = form.elements[i];
		if (e.type=="checkbox"){
			if (e.checked == true){
				v.push(form.elements[i].value);
			}
		}
	 }
	//alert(v.length);
	if (v.length != 0){
		window.open("/play.php?id=" + v.join(",") + "","musiclist","");
	}else{
		alert("请选择歌曲再播放?");
		return false;
	}
}

function setTab(name,cursel,n){
	for(i=1;i<=n;i++){
		var menu=document.getElementById(name+i);
		var con=document.getElementById("con_"+name+"_"+i);
		menu.className=i==cursel?"hover":"";
		con.style.display=i==cursel?"block":"none";
	}
}

function Check(n) {
	var obj = document.getElementById("menu"+n)
	if (obj.style.display=="none") {
	obj.style.display=""
	}else {
	obj.style.display="none"
	}
} 
function showAstroValue(n,nValue,nTxt) {
	if (n == 1){
		var thisInput0 = document.getElementById("type");
		var thisInput1 = document.getElementById("typename");
		thisInput0.value = nValue;
		thisInput1.value = nTxt;
	}
}

function CopyTxt(obj){  
	obj.select();     
	js=obj.createTextRange();          
	js.execCommand("Copy");    
	alert("复制成功，您可以粘贴到你的QQ/MSN上推荐给你的好友");    
}  

function RndNum(n){
	var rnd="";
	rnd = Math.floor(Math.random()*10);
	return rnd;
}

function CheckRND(myform){	
	var strCBValue = "";
	var rnds = myform.elements.length;
	for (var i=0;i<myform.elements.length;i++){  //用来历遍form中所有控件,
		var e = myform.elements[i];
		var rnd = RndNum(rnds);
		e.checked = false;
		if(rnd > 5){					//当是checkbox时才执行下面
			e.checked = true;
		}
	}
}