个人总结JS

1，动态加载table的行列

function testLoad(){

 var table = document.getElementById("mytable");

 for(var i=0;i<this.opener.unFoundFieldTaskIdList.length;i++){

     var row = table.insertRow(table.rows.length);

     row.insertCell(0).innerHTML = i+1;

     row.insertCell(1).innerHTML = this.opener.unFoundFieldTaskIdList[i];

 }

}

2，JS正则表达式

 // 按正则过滤输入文本,只允许输入数字

   function checkNumber(tar){

       var reg = /^[0-9]+$/;

       if(!reg.test(tar.value)){

        tar.value = '';

       }

 }

3,通过父元素来查找子元素

 ParentElement.childNodes[]

 Var p = a.parentNode;

4,父子页面传值

 父页面：var obj = window;

   obj.unFoundFieldTaskIdList;

 子页面：this.opener.unFoundFieldTaskIdList这样就能取到值

5,case when then when then else end用法:

    SELECT (CASE  WHEN T.NUMID = 2 THEN T.MATCHID ELSE NULL END) FROM TASK_INFO T

6,批量更新

  Update table t1 set (t1.c1,t1.c2) = (select t2.c1,t2.c2 from table t2 where t1.id = t2.id)

7, substr截取字符串:

 Substr(msg,startindex,endindex)

8,Instr(msg,targetmsg,1,1)->msg是需要判断的字符串，targetmsg目标字符串，1是从第一位开始，1出现的第几次。

9,like 模糊匹配，通配符

 %代表任意个字符，_代表任意一个字符

10,原生js创建异步请求:

 function createXMLHttp() {   

        var XmlHttp;

        if (window.ActiveXObject)

        {

            var arr=["MSXML2.XMLHttp.6.0","MSXML2.XMLHttp.5.0", "MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0","MSXML2.XMLHttp","Microsoft.XMLHttp"];

            for(var i=0;i<arr.length;i++) {

                try {

     XmlHttp = new ActiveXObject(arr[i]);

                    return XmlHttp;

                } catch(error) {

                }

            }

        } else {

            try {

                XmlHttp=new XMLHttpRequest();

                return XmlHttp;

            }

            catch(otherError) {

   }

        }

 }

 // 发送post请求

    function xmlPost(method,url,param,syncFlg,timerName) {

       var result;        

       var xmlHttp = createXMLHttp();

　　         xmlHttp.open(method,url,syncFlg);　　  

　　       xmlHttp.onreadystatechange = function() {　　   

　　         if(xmlHttp.readyState == 4 && xmlHttp.status == 200) {

            result = xmlHttp.responseText;

            var json = eval("("+result+")");

            if(json.taskSmeltTimerStop == true){

        window.clearInterval(timerName); 

             } else {

     var resultMsg = '<div id="successdiv" class="successmsg">'+json.taskSmeltMsg+'</div>';

     document.getElementById('printMassage').innerHTML = resultMsg;

             }

         }

       }

       xmlHttp.send(param);

 }