是不是里面还有空格啊?有空格的话先把空格去掉在 obj==null¦ ¦obj=="" function trim (v){ return v.replace(/\s+$|^\s+/g,""); } obj==null¦ ¦trim(obj)=="" 这样试试!
我把我的代码贴上来,你帮我看看吧。。<script type="text/javascript"> var xmlHttp; var content; var oCurrRow=""; var id; var miaoshu; var phonumber=new Array(); var lens; var phonenumbers; var xmlDoc; var tagvals; var tagval=new Array(); var msgObj; var bgObj; var title;
建議先var xx=你要判斷的東西
再對xx做判斷的好
忘說了
obj==null¦ ¦obj==""
function trim (v){
return v.replace(/\s+$|^\s+/g,"");
}
obj==null¦ ¦trim(obj)=="" 这样试试!
var xmlHttp;
var content;
var oCurrRow="";
var id;
var miaoshu;
var phonumber=new Array();
var lens;
var phonenumbers;
var xmlDoc;
var tagvals;
var tagval=new Array();
var msgObj;
var bgObj;
var title;
function SelectRow(oRow)
{
if(oCurrRow)
{
oCurrRow.style.backgroundColor="";
}
oRow.style.backgroundColor ='#EBF8FF';
oCurrRow = oRow;
}function sAlert(str){
var msgw,msgh,bordercolor;
msgw=400;//提示窗口的宽度
msgh=100;//提示窗口的高度
titleheight=25; //提示窗口标题高度
bordercolor="#336699";//提示窗口的边框颜色
titlecolor="#99CCFF";//提示窗口的标题颜色
var sWidth,sHeight;
sWidth=document.body.offsetWidth;
sHeight=screen.height;
bgObj=document.createElement("div");
bgObj.setAttribute('id','bgDiv');
bgObj.style.position="absolute";
bgObj.style.top="0";
bgObj.style.background="#777";
bgObj.style.filter="progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75";
bgObj.style.opacity="0.6";
bgObj.style.left="0";
bgObj.style.width=sWidth + "px";
bgObj.style.height=sHeight + "px";
bgObj.style.zIndex = "10000";
document.body.appendChild(bgObj);
msgObj=document.createElement("div")
msgObj.setAttribute("id","msgDiv");
msgObj.setAttribute("align","center");
msgObj.style.background="white";
msgObj.style.border="1px solid " + bordercolor;
msgObj.style.position = "absolute";
msgObj.style.left = "50%";
msgObj.style.top = "50%";
msgObj.style.font="12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";
msgObj.style.marginLeft = "-225px" ;
msgObj.style.marginTop = -75+document.documentElement.scrollTop+"px";
msgObj.style.width = msgw + "px";
msgObj.style.height =msgh + "px";
msgObj.style.textAlign = "center";
msgObj.style.lineHeight ="25px";
msgObj.style.zIndex = "10001";
title=document.createElement("h4");
title.setAttribute("id","msgTitle");
title.setAttribute("align","right");
title.style.margin="0";
title.style.padding="3px";
title.style.background=bordercolor;
title.style.filter="progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);";
title.style.opacity="0.75";
title.style.border="1px solid " + bordercolor;
title.style.height="18px";
title.style.font="12px Verdana, Geneva, Arial, Helvetica, sans-serif";
title.style.color="white";
title.style.cursor="pointer";
title.innerHTML="";
document.body.appendChild(msgObj);
document.getElementById("msgDiv").appendChild(title);
var txt=document.createElement("p");
txt.style.margin="1em 0";
txt.setAttribute("id","msgTxt");
txt.innerHTML=str;
document.getElementById("msgDiv").appendChild(txt);
if(title.onclick){
guanbi(); }
}
function guanbi(){
document.body.removeChild(bgObj);
document.getElementById("msgDiv").removeChild(title);
document.body.removeChild(msgObj);
}
function createXMLHttpRequest(){
if(window.ActiveXObject){
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest){
xmlHttp=new XMLHttpRequest();
}
} function changecode(str){
str = encodeURI(str);
return str;
}function save(){
createXMLHttpRequest();
miaoshu=document.getElementById("miaoshu").value;
content=document.getElementById("area").value;
if(miaoshu==""||content==""){
alert("内容或描述为空,请重新输入!");
}else{
content =changecode(content);
miaoshu=changecode(miaoshu);var url=encodeURI("TDIY_SMSCONTENT_Servlet?method=insert&content="+content+"&miaoshu="+miaoshu);
xmlHttp.open("GET",url,true);
xmlHttp.onreadystatechange=handlestatechange1;
xmlHttp.send(null);}
}
function handlestatechange1(){
if(xmlHttp.readystate==4){
if(xmlHttp.status==200){
alert("提交成功!");
//document.all.area.innerText="";
//document.all.miaoshu.innerText="";
startRequest();}
}
}
function update(){
createXMLHttpRequest();
var id=oCurrRow.cells(0).innerHTML;content=document.getElementById("area").value;content =changecode(content);var url=encodeURI("TDIY_SMSCONTENT_Servlet?method=update&id="+id+"&content="+content);
xmlHttp.open("GET",url,true);
xmlHttp.onreadystatechange=handlestatechange2;
xmlHttp.send(null);
}
function handlestatechange2(){if(xmlHttp.readystate==4){if(xmlHttp.status==200){
alert("提交成功!");
startRequest();
}}}function delete11(){
if(oCurrRow==""||oCurrRow==null){
alert("请选中一行再删除");
}else{
var id=oCurrRow.cells(0).innerHTML;
var url=encodeURI("TDIY_SMSCONTENT_Servlet?method=delete&id="+id);
xmlHttp.open("GET",url,true);
xmlHttp.onreadystatechange=handlestatechange2;
xmlHttp.send(null);
}
function handlestatechange2(){if(xmlHttp.readystate==4){if(xmlHttp.status==200){
alert("删除成功!");
startRequest();
}}}
}function select11(){
createXMLHttpRequest();var url="TDIY_SMSCONTENT_Servlet?method=select11";
xmlHttp.open("GET",url,true);
xmlHttp.onreadystatechange=function(){if(xmlHttp.readystate==4){
if(xmlHttp.status==200){test();
}
}
}
xmlHttp.send(null);}
function test(){ xmlDoc = xmlHttp.responseXML.documentElement;
phonenumbers=xmlDoc.getElementsByTagName("tagkey");
tagvals=xmlDoc.getElementsByTagName("tagval");
lens=phonenumbers.length;
//}function check(){
if(oCurrRow==""){
alert("请选中一行再编辑");}
else{
var s=bianji();
sAlert(s);
}
}
function bianji(){content=oCurrRow.cells(1).innerHTML;
var par;
par="<select name='select' id='select'>";
par+="<option value=''></option>";
for(var j=0;j<lens;j++){
phonumber[j]=phonenumbers[j].firstChild.nodeValue;par+="<option value='";
par+=phonumber[j];
par+="'>";
par+=phonumber[j];
par+="</option>";
}par+="<input type='button' value='确定' onclick='inner();'>";
par+="<br>";
par+="<textarea id='area' cols='25' rows='5' align='center'>";
par+=content;
par+="</textarea>";
par+="<input type='button' id='tijiao' value='提交' onclick='update()&guanbi();'>";return par;
}function inner(){
select11();
var d;
var num="";
var tagval;
var number=document.all("select").options[document.all("select").selectedIndex].value; for(d=0;d<lens;d++){
phonumber[d]=phonenumbers[d].firstChild.nodeValue;
if(phonumber[d]==number){num=d;
}
}if(number==""){
alert("请在下拉列表中选择!");
}else{
tagval=tagvals[num].firstChild.nodeValue;
//var number=get(this);
var area=document.getElementById("area");area.insertAdjacentHTML("beforeEnd",tagval);
}
}function add(){
var par1;
par1="内容:<input type='textarea' id='area'>";
par1+="<br>";
par1+="描述:<input type='text' id='miaoshu'>";
par1+="<br>";
par1+="<input type='button' value='提交' onclick='save()&guanbi();'>";
return par1;
}</script>
</head><body>
<br>
<h1 align="center">欢迎使用短信编辑后台</h1>
<br><br>
<div id="tablelist"></div>
<br><br>
<div align="center">
<input type="button" value="增加记录" onclick='sAlert(add());' class="button" />
<input type="button" value="删除记录" onclick='delete11();'/>
<input type="button" value="编辑选中行内容" onclick='select11()&check();'/>
</div>
<body><br /></body>
可以用oCurrRow='empty' 判断,但是SelectRow(oRow)就会报错了不知道到底该怎样。。