var xx = JSON.parse(a);
xxL=Object.keys(xx[0]).length; //转换后可以获取json长度
var home_4_xs = [];
var home_4_xx = [];
for(var i=1;i<=xxL;i++){
var dataxs=eval('xx[0].data'+i);
var dataxx=eval('xx[1].data'+i);
home_4_xs.push(dataxs);
home_4_xx.push(dataxx);
}
