浏览器跨平台代码集合

 键盘按键代码：

code = (e.charCode) ? e.charCode :

       ((e.keyCode) ? e.keyCode :

       ((e.which) ? e.which : 0));

 

生成Xml文档对象：

function strToxml(str)

{

        var xml = null;

        if(window.ActiveXObject)

        {

                xml = new ActiveXObject("Microsoft.XMLDOM");

                xml.loadXML(str);

        } else {

                var parser = new DOMParser();

                xml = parser.parseFromString(str, "text/xml");

        }

        return xml;

}

 

生成XMLHTTPREQUEST对象：

function createXmlHttpRequestObject()

{

  var xmlHttp;

  try

  {

    xmlHttp = new XMLHttpRequest();

  }

  catch(e)

  {

    var XmlHttpVersions = new Array("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

    {

      try

 

      {

        xmlHttp = new ActiveXObject(XmlHttpVersions[i]);

      }

      catch (e) {}

    }

  }

  if (!xmlHttp)

    alert("Error creating the XMLHttpRequest object.");

  else

return xmlHttp;

 

浏览器版本判断：

var ie5 = window.navigator.userAgent.indexOf( "MSIE 5" )!=-1;

var tplsource = parent.window.frames.dataFrame.window;

var NS4 = (document.layers) ? true:false;

var IE4 = (document.all) ? true:false;

var DOM = (document.getElementById) ? true:false;

if (IE4) DOM = false;

 

function popUp()

{

        var layerName = "presending";

        if (NS4)

                document.layers[layerName].visibility = "show";

        else if (DOM)

                document.getElementById(layerName).style.display = "block";

        else

                document.all[layerName].style.display = "block";

}

 

文本自动选定范围：

function selectRange(oText, start, length)

{

  if (oText.createTextRange)

  {

    //IE

    var oRange = oText.createTextRange();

    oRange.moveStart("character", start);

    oRange.moveEnd("character", length - oText.value.length);

    oRange.select();

 

  }

  else

    // FF

    if (oText.setSelectionRange)

    {

      oText.setSelectionRange(start, length);

    }

  oText.focus();

}

 

getElementById方法通用化方法定义：

function getElementById(aID){

 var element = null;

 if (isMozilla || isIE5)

   element = document.getElementById(aID)

 else if (isNetscape4)

   element = document.layers[aID]

 else if (isIE4)

   element = document.all[aID];

 return element;

}