function openNext(id,num){

	num++;

	var symbola = $("#i"+id).val();

        //console.log("#i"+id);

        if(symbola =="+"){

		$.ajax({  

              type:"POST",  

              url:"/5akg4j/sysMenus/findSub",  

              data:{id:id},   

              dataType:"json",

              error: function(){alert('加载错误，请重新操作。'); },              

              success:function(dates){  

	           	var records=dates.rows;

	           	if(typeof(records) == "undefined") {

	           		alert("没有子菜单");

					return;

	           	}

		        if(records.length==0){

			    	alert("取得值为空");

			    }else{

			   		 for(var i=records.length-1; i>=0;i--){

				   		var blank = "";

				   		for(var j = 0;j<num;j++){

				   			blank +="&nbsp;&nbsp;&nbsp;&nbsp;";

				   		}	

				   		var str  =    "<tr id=\""+records[i].id+"\"><td align=\"center\"><input type=\"checkbox\" name=\"checkOne\""+

						   			 "id=\"checkOne\" value=\""+records[i].id+"\" /></td>"+

						   			 "<td align=\"left\">"+blank+records[i].id+"</td><td>";

				   		if(records[i].subcount>0){

					   		str += "<input type=\"button\" id=\"i"+records[i].id+"\" "+

				   			 		"onclick=\"openNext("+records[i].id+","+num+")\" value=\"+\" ></button>";

				   		}		 

						   str  +=    "</td><td align=\"center\">"+records[i].name+"</td>"+

						   			 "<td align=\"center\">"+records[i].accurl+"</td>"+