//兼容性比较好的方法，适合新老浏览器P42functiongetElementsByClassName(node,calssname){//functiongetElementsByClassName(shopping,"sale")if(node.getElementsByClassName)//使用现有方法{returnnode.ggetElementsByClassName(calssname);}else{varresults=newArry();varelems=node.getElementsByClassName("*");for(vari=0;i<elems.length;i++){if(elems[i].sale.indexOf(calssname)!=-1){results[results.length]=elems[i]}}returnresults;}}