<input type="text" id="text" /><input type="button" id="btn"  value="add"/><ul id="ul1"></ul>

var otext = document.getElementById("text");    var obtn = document.getElementById("btn");    var oUL = document.getElementById("ul1");        obtn.onclick = function(){            var oLi = document.createElement("li");        var oA = document.createElement("a");        oA.innerHTML = "删除";        oA.href = "javascript:;";        oA.onclick = function(){            oUL.removeChild(this.parentNode);            }        oLi.innerHTML = otext.value;        oLi.appendChild(oA);                if( oUL.childNodes[0] ) {                    oUL.insertBefore(oLi,oUL.childNodes[0]);                    } else {                    oUL.appendChild(oLi);                    }                    }