Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Mulongo oyo etiyamaki na archive. Tuna motuna mosusu soki osengeli na lisalisi

It's keydown event "event.preventDefault()" not worked when i used XMLHttpRequest object with synchronal request.

  • 1 eyano
  • 14 eza na bankokoso oyo
  • 1 view
  • Eyano yasuka ya cash2910

more options

dear all. by the question title, i want to disabled "Tab" key in one input field in HTML page, it's normal worked by :

=========HTML================

<input id="fy" value="" onkeydown="doKeydown(this,event)">

==============================
=========SCRIPT===============

<script> function doKeydown(obj,ev){

   if(ev.keyCode == 9){
      
      if (ev.preventDefault){
           ev.preventDefault();
           ev.stopPropagation();
      }
      
      ev.cancelBubble=true;
      
   }

} </script>

============================

but,when i add XMLHttpRequest with synchronal request in doKeydown function. it's can't worked....

====== <ALL HTML>=======

<meta http-equiv="Content-Type" content="text/html; charset=GB2312"> <title>FF XMLHttpRequest</title> <script type="text/javascript"> function createXmlHttpObj(){ var _xmlHttp; try { _xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try { _xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e2) { _xmlHttp = null; } } if (_xmlHttp==null && typeof XMLHttpRequest != 'undefined') { _xmlHttp = new XMLHttpRequest(); } return _xmlHttp; } function transCompany_ajax_codeValue(codeObjAry,containerObjAry,fieldStrAry,ev) { var urlStr = "./test1.asp?transCompanyCode={arg0}"; ajax_codeValue1(codeObjAry ,containerObjAry ,fieldStrAry ,urlStr); } function ajax_codeValue1(codeObjAry,containerObjAry,fieldStrAry,urlStr,callbackFuncName) { var _async = document.getElementById("is_async").checked; for (i=0;i<codeObjAry.length;i++) { urlStr = urlStr.replace("{arg" + i + "}",codeObjAry[i].value); if (codeObjAry[i].value=="") { hasNotInputFlag = false; } } var xmlHttpObj = createXmlHttpObj(); //xmlHttpObj.async = _async; xmlHttpObj.open("get",urlStr, _async); xmlHttpObj.setRequestHeader("Content-Type", "text/xml"); //xmlHttpObj.setRequestHeader("X-Requested-With","XMLHttpRequest"); if(_async){ xmlHttpObj.onreadystatechange = function(){ //console.log("onReadyStateChange"); if (this.readyState == 4) { if (this.status == 200) { returnValueObj = eval("(" + this.responseText + ")"); for (i=0;i<containerObjAry.length;i++) { if (containerObjAry[i]!=null) { setObjShow(containerObjAry[i] , eval("returnValueObj." + fieldStrAry[i])); } } //console.log("load success"); } else{ } } } ; } xmlHttpObj.send(); if(!_async){ var returnValueObj = eval("(" + xmlHttpObj.responseText + ")"); for (i=0;i<containerObjAry.length;i++) { if (containerObjAry[i]!=null) { setObjShow(containerObjAry[i],eval("returnValueObj." + fieldStrAry[i])); } } } } function oncodeChange(){ var obj = document.getElementById("fy") ; var disObj = document.getElementById("uo"); var codeObjAry = new Array(); codeObjAry[0] = obj; var containerObjAry = new Array(); containerObjAry[0] = disObj; var filedAry = new Array(); filedAry[0] = "transCompanyName"; transCompany_ajax_codeValue(codeObjAry,containerObjAry,filedAry); } function setObjShow(obj,showValue) { //when is cell object try{ obj.setValue(showValue?showValue:""); return; }catch(e){ } if (obj.tagName == "INPUT") { obj.value = showValue?showValue:""; } else { obj.innerHTML = showValue?showValue:""; } } function doKeydown(obj,ev){ if(ev.keyCode == 9){ oncodeChange(); if (ev.preventDefault){ ev.preventDefault(); ev.stopPropagation(); } ev.cancelBubble=true; } } </script> async: <input type="checkbox" id="is_async">
<input id="fy" value="" onkeydown="doKeydown(this,event)"> <input id="uo" value="" size="100">


====== </ALL HTML>=======

========<SERVER PAGE USE ASP>===========

<%@ Language=VBScript %> <%response.charset="utf-8"%> <% if trim(request.queryString("transCompanyCode"))="" then

   response.write "{""transCompanyName"":""Can not get name"",""transCompanyCode"":""""}"
   response.end

end if

response.write "{""transCompanyName"":""Name " & trim(request.queryString("transCompanyCode")) &""",""transCompanyCode"":""a""}" %> ========</SERVER PAGE>===========

dear all. by the question title, i want to disabled "Tab" key in one input field in HTML page, it's normal worked by : ===============HTML====================== <input id="fy" value="" onkeydown="doKeydown(this,event)"> ========================================== ===============SCRIPT===================== <script> function doKeydown(obj,ev){ if(ev.keyCode == 9){ if (ev.preventDefault){ ev.preventDefault(); ev.stopPropagation(); } ev.cancelBubble=true; } } </script> ======================================== but,when i add XMLHttpRequest with synchronal request in doKeydown function. it's can't worked.... '''====== <ALL HTML>=======''' <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=GB2312" /> <title>FF XMLHttpRequest</title> <script type="text/javascript"> function createXmlHttpObj(){ var _xmlHttp; try { _xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try { _xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e2) { _xmlHttp = null; } } if (_xmlHttp==null && typeof XMLHttpRequest != 'undefined') { _xmlHttp = new XMLHttpRequest(); } return _xmlHttp; } function transCompany_ajax_codeValue(codeObjAry,containerObjAry,fieldStrAry,ev) { var urlStr = "./test1.asp?transCompanyCode={arg0}"; ajax_codeValue1(codeObjAry ,containerObjAry ,fieldStrAry ,urlStr); } function ajax_codeValue1(codeObjAry,containerObjAry,fieldStrAry,urlStr,callbackFuncName) { var _async = document.getElementById("is_async").checked; for (i=0;i<codeObjAry.length;i++) { urlStr = urlStr.replace("{arg" + i + "}",codeObjAry[i].value); if (codeObjAry[i].value=="") { hasNotInputFlag = false; } } var xmlHttpObj = createXmlHttpObj(); //xmlHttpObj.async = _async; xmlHttpObj.open("get",urlStr, _async); xmlHttpObj.setRequestHeader("Content-Type", "text/xml"); //xmlHttpObj.setRequestHeader("X-Requested-With","XMLHttpRequest"); if(_async){ xmlHttpObj.onreadystatechange = function(){ //console.log("onReadyStateChange"); if (this.readyState == 4) { if (this.status == 200) { returnValueObj = eval("(" + this.responseText + ")"); for (i=0;i<containerObjAry.length;i++) { if (containerObjAry[i]!=null) { setObjShow(containerObjAry[i] , eval("returnValueObj." + fieldStrAry[i])); } } //console.log("load success"); } else{ } } } ; } xmlHttpObj.send(); if(!_async){ var returnValueObj = eval("(" + xmlHttpObj.responseText + ")"); for (i=0;i<containerObjAry.length;i++) { if (containerObjAry[i]!=null) { setObjShow(containerObjAry[i],eval("returnValueObj." + fieldStrAry[i])); } } } } function oncodeChange(){ var obj = document.getElementById("fy") ; var disObj = document.getElementById("uo"); var codeObjAry = new Array(); codeObjAry[0] = obj; var containerObjAry = new Array(); containerObjAry[0] = disObj; var filedAry = new Array(); filedAry[0] = "transCompanyName"; transCompany_ajax_codeValue(codeObjAry,containerObjAry,filedAry); } function setObjShow(obj,showValue) { //when is cell object try{ obj.setValue(showValue?showValue:""); return; }catch(e){ } if (obj.tagName == "INPUT") { obj.value = showValue?showValue:""; } else { obj.innerHTML = showValue?showValue:""; } } function doKeydown(obj,ev){ if(ev.keyCode == 9){ oncodeChange(); if (ev.preventDefault){ ev.preventDefault(); ev.stopPropagation(); } ev.cancelBubble=true; } } </script> </head> <body> async: <input type="checkbox" id="is_async"> <br> <input id="fy" value="" onkeydown="doKeydown(this,event)"> <input id="uo" value="" size="100" > </body> </html> '''====== </ALL HTML>=======''' '''========<SERVER PAGE USE ASP>===========''' <%@ Language=VBScript %> <%response.charset="utf-8"%> <% if trim(request.queryString("transCompanyCode"))="" then response.write "{""transCompanyName"":""Can not get name"",""transCompanyCode"":""""}" response.end end if response.write "{""transCompanyName"":""Name " & trim(request.queryString("transCompanyCode")) &""",""transCompanyCode"":""a""}" %> '''========</SERVER PAGE>==========='''

Ezalaki modifié na parsec

All Replies (1)

more options

check your other js code ...