瀑布流无法居中，测试代码无法弹出警告

Question

window.onload = function(){
    imgLocating("container","box")
}

function imgLocating(ccontainer,bbox){
    var sceenWidth = document.documentElement.clientWidth;
    var imgWidth = bbox.offsetWidth;
    var cols = Math.floor(sceenWidth/imgWidth);
    var l = imgWidth*cols;
    ccontainer.style.cssText = "width:"+l+"px; margin:0 auto";
    alert(l);

}

Answer 1

 ccontainer.style.cssText = "width:"+l+"px; margin:0 auto";  //ccontainer传入的是一个字符串"container",见imgLocating("container","box")，没有style，报错了，所以alert没有执行。如果"container是id,那么应该是document.getElementById("container").style.cssText