摘要：View Code 1 function addItemmonth() {2 3 var tOption = document.createElement("Option");4 tOption.text = "月明显";5 tOption.selected = true;6 tOption.value = document.all("DropDownList3").options.length + 1;7 document.all("DropDownList3").add(tOption);8 9 } 阅读全文