js 选项卡封装

function tab(input,div){
			for(var i = 0; i < input.length; i++){
				input[i].index = i;
				input[i].onclick = function (){
					for(var i = 0; i < input.length;i++){
						input[i].className ="";
						div[i].style.display = "none";
					}
					this.className = "active";
					div[this.index].style.display ="block";
				}
			}
		}