JQuery/JS ?select标签设置默认值、设置禁止选择 button按钮禁止点击

//**1、设置默认值：**//var osel=document.getElementById("selID"); //得到select的ID ?var opts=osel.getElementsByTagName("option");//得到数组option ?var obt=document.getElementById("bt"); ?obt.onclick=function(){ ???opts[3].selected=true;//设置option第4个元素，即value="3"为默认选中 ?}//**2、设置禁止选择：**//$("#selectId").attr("disabled", "disabled");$("#selectId").attr("style", "background-color: #EEEEEE;");//设为灰色，看起来更像不能操作的按钮
//**3、按钮禁止点击**//$(‘#buttonId‘).attr("disabled", true);$("#buttonId").attr("style", "background-color: #EEEEEE;");//设为灰色，看起来更像不能操作的按钮

<!---省略部分代码---><tbody> ???????<tr class="firstRow"> ???????????<td valign="top" style="word-break: break-all; width: 20%;" rowspan="1" colspan="1"> ???????????????<select id="mekeupType" onchange="MekeupTypeChange();"> ???????????????????<option value="moneyWay">货币补偿</option> ???????????????????<option value="houseWay">房屋补偿</option> ???????????????</select> ???????????????&nbsp; &nbsp;&nbsp; ???????????</td> ???????????<td valign="top" style="word-break: break-all; width: 50%;" rowspan="1" colspan="1"> ???????????<input type="button" value="计算" id="buttonCount" onclick="buttonCountClick();" style="background-color: #339999; color: white;border-color: #339999"" />&nbsp; &nbsp;&nbsp; ???????????<input type="button" value="协议打印" id="buttonPoint" onclick="Painting()" style="background-color: #339999; color: white;border-color: #339999""/>&nbsp; &nbsp;&nbsp; ???????????<input type="button" value="签约确认" id="buttonSign" onclick="Sign()" style="background-color: #339999; color: white;border-color: #339999"/> ???????????????@*<input type="button" ?value="返回列表" id="buttonBack" onclick="GoBackList();"/>*@ ???????????</td> ???????????<td width="189" valign="top"></td> ???????????<td width="189" valign="top"></td> ???????????<td width="189" valign="top"></td> ???????????<td width="189" valign="top"></td> ???????</tr> ???</tbody></table><!---省略部分代码---> <script> $(document).ready(function () {　　//*****省略部分代码*****// ???var mekeupel = document.getElementById("mekeupType"); //得到select的ID ???var opts = mekeupel.getElementsByTagName("option");//得到数组option ???if (compensationMethod.toLowerCase() == "null") {//null ???????//null ???} ???else if (compensationMethod.toLowerCase() == "33c3e03a-3bb6-4147-87bd-4c77b84d615b".toLowerCase()) //货币 ???{ ???????opts[0].selected = true;//设置option第1个元素 ???} ???else if (compensationMethod.toLowerCase() == "c80ea27b-2d11-4e7d-8d6e-65d2b5210d8a".toLowerCase()) //产权置换 ???{ ???????opts[1].selected = true;//设置option第1个元素 ???} ???IsSign = parseInt(data[0]["issign"]); ???if (1 == IsSign) { ???????//设置安置补偿方式禁止选择 ???????//disabled="disabled" ???????//background-color: #EEEEEE; ???????$("#mekeupType").attr("disabled", "disabled"); ???????$("#mekeupType").attr("style", "background-color: #EEEEEE;"); ???????//设置计算按钮、签约确认按钮 ??禁止click ???????$(‘#buttonCount‘).attr("disabled", true); ???????$("#buttonCount").attr("style", "background-color: #EEEEEE;"); ???????$(‘#buttonSign‘).attr("disabled", true); ???????$("#buttonSign").attr("style", "background-color: #EEEEEE;"); ???} else { ???}//*****省略部分代码*****//});</script>