js--table操作

table排序

function sort() {
	var items = document.getElementById("items");
	for(var i=1,length=items.cells.length;i<length;i++){
		items.cells[i].index = i;
		items.cells[i].onclick = function(){
			console.time("hello");
			var function_id = this.getAttribute("id");
			if (function_id.indexOf("sort_") !== -1) {
				function_id = function_id.substr(5);
			};
			
			var elements = window.table.getElementsByClassName(function_id,"td");
			var oTR = [];
			for (var i=0,length=elements.length;i<length;i++) {
				var tmp_td = {};
				tmp_td.dom = elements[i];
				tmp_td.num = elements[i].innerHTML || 0;
				oTR[oTR.length] = tmp_td;
			};
			
			if(this.index == window.sort_index){
				//表示已经排序过了，只需要将其反序排列即可
				oTR.reverse();
			}else{
				oTR.sort(function(a, b) {
					return a.num - b.num
				});
			}
			
			var fragment = document.createDocumentFragment();
			for (var i=0;i<length;i++) {
				fragment.appendChild(oTR[i].dom.parentNode);
			};
			
			window.sort_index = this.index;
			window.table.appendChild(fragment);
			
			console.timeEnd("hello");
		}
	}
}