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";

				}

			}

		}