function queryfun(){
       if(!checkvalid())
           return;
       document.forms[0].myaction.value="query";
       document.forms[0].submit();
    }
    function modifyfun(obj){
       document.forms[0].myaction.value="toupdate";
       document.getElementById("id").value=obj;
       document.forms[0].submit();
    }
    function deletefun(obj){
       document.forms[0].myaction.value="delete";
       document.getElementById("id").value=obj;
       document.forms[0].submit();
    }
    function checkvalid(){
        return true;
    }
    function insertfun(){
       document.forms[0].myaction.value="insertsave";
       if(!checkvalid())
           return;
       document.forms[0].submit();
    }
    
    function updatefun(){
       document.forms[0].myaction.value="updatesave";
       if(!checkvalid())
           return;
       document.forms[0].submit();
    }
    function xlsclick(){
       document.forms[0].myaction.value="excel";
       document.forms[0].target="_blank";
       document.forms[0].submit();
       document.forms[0].target="_self";
    }
    function operatorfun(obj){
       document.getElementById("id").value=obj;
	   document.forms[0].myaction.value="operator";
	   document.getElementById("start").value=(parseInt(document.getElementById("currentpage").value)-1)*20;
       document.forms[0].submit();
	   return false;
    }