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1.document.formName.item("itemName") ÎÊÌâ
˵Ã÷:IEÏÂ,¿ÉÒÔʹÓÃdocument.formName.item("itemName")»òdocument.formName.elements["elementName"];FirefoxÏÂ,Ö»ÄÜʹÓÃdocument.formName.elements["elementName"].
½â¾ö·½·¨:ͳһʹÓÃdocument.formName.elements["elementName"].

2.¼¯ºÏÀà¶ÔÏóÎÊÌâ
˵Ã÷:IEÏÂ,¿ÉÒÔʹÓÃ()»ò[]»ñÈ¡¼¯ºÏÀà¶ÔÏó;FirefoxÏÂ,Ö»ÄÜʹÓÃ[]»ñÈ¡¼¯ºÏÀà¶ÔÏó.
½â¾ö·½·¨:ͳһʹÓÃ[]»ñÈ¡¼¯ºÏÀà¶ÔÏó.

3.×Ô¶¨ÒåÊôÐÔÎÊÌâ
˵Ã÷:IEÏÂ,¿ÉÒÔʹÓûñÈ¡³£¹æÊôÐԵķ½·¨À´»ñÈ¡×Ô¶¨ÒåÊôÐÔ,Ò²¿ÉÒÔʹÓÃgetAttribute()»ñÈ¡×Ô¶¨ÒåÊôÐÔ;FirefoxÏÂ,Ö»ÄÜʹÓÃgetAttribute()»ñÈ¡×Ô¶¨ÒåÊôÐÔ.
½â¾ö·½·¨:ͳһͨ¹ýgetAttribute()»ñÈ¡×Ô¶¨ÒåÊôÐÔ.

4.eval("idName")ÎÊÌâ
˵Ã÷:IEÏÂ,,¿ÉÒÔʹÓÃeval("idName")»ògetElementById("idName")À´È¡µÃidΪidNameµÄHTML¶ÔÏó;FirefoxÏÂÖ»ÄÜʹÓÃgetElementById("idName")À´È¡µÃidΪidNameµÄHTML¶ÔÏó.
½â¾ö·½·¨:ͳһÓÃgetElementById("idName")À´È¡µÃidΪidNameµÄHTML¶ÔÏó.

5.±äÁ¿ÃûÓëijHTML¶ÔÏóIDÏàͬµÄÎÊÌâ
˵Ã÷:IEÏÂ,HTML¶ÔÏóµÄID¿ÉÒÔ×÷ΪdocumentµÄÏÂÊô¶ÔÏó±äÁ¿ÃûÖ±½ÓʹÓÃ;FirefoxÏÂÔò²»ÄÜ.FirefoxÏÂ,¿ÉÒÔʹÓÃÓëHTML¶ÔÏóIDÏàͬµÄ±äÁ¿Ãû;IEÏÂÔò²»ÄÜ¡£
½â¾ö·½·¨:ʹÓÃdocument.getElementById("idName")´úÌædocument.idName.×îºÃ²»ÒªÈ¡HTML¶ÔÏóIDÏàͬµÄ±äÁ¿Ãû,ÒÔ¼õÉÙ´íÎó;ÔÚÉùÃ÷±äÁ¿Ê±,Ò»ÂɼÓÉÏvar,ÒÔ±ÜÃâÆçÒå.

7.input.typeÊôÐÔÎÊÌâ
˵Ã÷:IEÏÂinput.typeÊôÐÔΪֻ¶Á;µ«ÊÇFirefoxÏÂinput.typeÊôÐÔΪ¶Áд.

9.event.xÓëevent.yÎÊÌâ
˵Ã÷:IEÏÂ,even¶ÔÏóÓÐx,yÊôÐÔ,µ«ÊÇûÓÐpageX,pageYÊôÐÔ;FirefoxÏÂ,even¶ÔÏóÓÐpageX,pageYÊôÐÔ,µ«ÊÇûÓÐx,yÊôÐÔ.
½â¾ö·½·¨:ʹÓÃmX(mX = event.x ? event.x : event.pageX;)À´´úÌæIEϵÄevent.x»òÕßFirefoxϵÄevent.pageX.

10.event.srcElementÎÊÌâ
˵Ã÷:IEÏÂ,event¶ÔÏóÓÐsrcElementÊôÐÔ,µ«ÊÇûÓÐtargetÊôÐÔ;FirefoxÏÂ,event¶ÔÏóÓÐtargetÊôÐÔ,µ«ÊÇûÓÐsrcElementÊôÐÔ.
½â¾ö·½·¨:ʹÓÃobj(obj = event.srcElement ? event.srcElement : event.target;)À´´úÌæIEϵÄevent.srcElement»òÕßFirefoxϵÄevent.target.

13.frameÎÊÌâ
ÒÔÏÂÃæµÄframeΪÀý£º
<frame src="xxx.html" id="frameId" name="frameName" />

(1)·ÃÎÊframe¶ÔÏó:
IE:ʹÓÃwindow.frameId»òÕßwindow.frameNameÀ´·ÃÎÊÕâ¸öframe¶ÔÏó.
Firefox:Ö»ÄÜʹÓÃwindow.frameNameÀ´·ÃÎÊÕâ¸öframe¶ÔÏó.
ÁíÍ⣬ÔÚIEºÍFirefoxÖж¼¿ÉÒÔʹÓÃwindow.document.getElementById("frameId")À´·ÃÎÊÕâ¸öframe¶ÔÏó.

(2)Çл»frameÄÚÈÝ:
ÔÚIEºÍFirefoxÖж¼¿ÉÒÔʹÓÃwindow.document.getElementById("testFrame").src = "xxx.html"»òwindow.frameName.location = "xxx.html"À´Çл»frameµÄÄÚÈÝ.

Èç¹ûÐèÒª½«frameÖеIJÎÊý´«»Ø¸¸´°¿Ú£¬¿ÉÒÔÔÚfrmeÖÐʹÓÃparentÀ´·ÃÎʸ¸´°¿Ú¡£ÀýÈ磺parent.document.form1.filename.value="Aqing";

14.bodyÎÊÌâ
FirefoxµÄbodyÔÚbody±êǩûÓб»ä¯ÀÀÆ÷ÍêÈ«¶ÁÈë֮ǰ¾Í´æÔÚ£»¶øIEµÄbodyÔò±ØÐëÔÚbody±êÇ©±»ä¯ÀÀÆ÷ÍêÈ«¶ÁÈëÖ®ºó²Å´æÔÚ.

ÀýÈ磺
Firefox£º
<body>
<script type="text/javascript">
document.body.onclick = function(evt){
evt = evt || window.event;
alert(evt);
}
</script>
</body>
IE&Firefox£º
<body>
</body>
<script type="text/javascript">
document.body.onclick = function(evt){
evt = evt || window.event;
alert(evt);
} </script>

15. ʼþίÍз½·¨
IE£ºdocument.body.onload = inject; //Function inject()ÔÚÕâ֮ǰÒѱ»ÊµÏÖ

Firefox£ºdocument.body.onload = inject();

ÓÐÈË˵±ê×¼ÊÇ£º
document.body.onload=new Function('inject()');

16. firefoxÓëIE(parentElement)µÄ¸¸ÔªËصÄÇø±ð
IE£ºobj.parentElement
firefox£ºobj.parentNode

½â¾ö·½·¨: ÒòΪfirefoxÓëIE¶¼Ö§³ÖDOM,Òò´ËʹÓÃobj.parentNodeÊDz»´íÑ¡Ôñ.

17.innerTextÔÚIEÖÐÄÜÕý³£¹¤×÷£¬µ«ÊÇinnerTextÔÚFireFoxÖÐÈ´²»ÐÐ.
½â¾ö·½·¨:
if(navigator.appName.indexOf("Explorer") > -1){

    document.getElementById('element').innerText = "my text";

} else{

    document.getElementById('element').textContent = "my text";

}

18. FireFoxÖÐÀàËÆ obj.style.height = imgObj.height µÄÓï¾äÎÞЧ
½â¾ö·½·¨£º
obj.style.height = imgObj.height + 'px';

19. ie,firefoxÒÔ¼°ÆäËüä¯ÀÀÆ÷¶ÔÓÚ table ±êÇ©µÄ²Ù×÷¶¼¸÷²»Ïàͬ£¬ÔÚieÖв»ÔÊÐí¶ÔtableºÍtrµÄinnerHTML¸³Öµ£¬Ê¹ÓÃjsÔö¼ÓÒ»¸ötrʱ£¬Ê¹ÓÃappendChile·½·¨Ò²²»¹ÜÓá£
½â¾ö·½·¨£º
//Ïòtable×·¼ÓÒ»¸ö¿ÕÐУº
var row = otable.insertRow(-1);
var cell = document.createElement("td");
cell.innerHTML = " ";
cell.className = "XXXX";
row.appendChild(cell);

20. padding ÎÊÌâ
padding 5px 4px 3px 1px FireFoxÎÞ·¨½âÊͼòд,

±ØÐë¸Ä³É padding-top:5px; padding-right:4px; padding-bottom:3px; padding-left:1px;

21. Ïû³ýul¡¢olµÈÁбíµÄËõ½øÊ±
ÑùʽӦд³É:list-style:none;margin:0px;padding:0px;

ÆäÖÐmarginÊôÐÔ¶ÔIEÓÐЧ£¬paddingÊôÐÔ¶ÔFireFoxÓÐЧ

22. CSS͸Ã÷
IE£ºfilter:progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=60)¡£

FF£ºopacity:0.6¡£

23. CSSÔ²½Ç
IE£º²»Ö§³ÖÔ²½Ç¡£

FF£º -moz-border-radius:4px£¬»òÕß-moz-border-radius-topleft:4px;-moz-border- radius-topright:4px;-moz-border-radius-bottomleft:4px;-moz-border-radius- bottomright:4px;¡£

24. CSSË«Ïß°¼Í¹±ß¿ò
IE£ºborder:2px outset;¡£

FF£º -moz-border-top-colors: #d4d0c8 white;-moz-border-left-colors: #d4d0c8 white;-moz-border-right-colors:#404040 #808080;-moz-border-bottom-colors:#404040 #808080;

25£®ieÖ§³Ödocument.all ¶øfirefox ²»Ö§³Ö
¸ÄÓÃÏÂÃæÈý¸ötagµÄÆäÖÐÒ»¸öÀ´´úÌædocument.all
getElementsByTagName("tagName") ¿ÉÒԵõ½µÃµ½ËùÓбêÇ©ÔªËØµÄ¼¯ºÏ
getElementById("idName")          ¿ÉÒÔ°´idµÃµ½Ä³Ò»ÔªËØ
getElementsByName("Name")            ¿ÉÒԵõ½°´nameÊôÐԵõ½Ä³Ò»ÔªËØ

26¡¢firefox ÖÐʹÓÃinnerHTML µÄ·½·¨
<div id="online"></div>
document.all.online.innerHTML; //ÕâÖÖ·½·¨ÔÚIEÖпÉÒÔʹÓ㬵«²»ÊDZê×¼·½·¨
document.getElementById("online").innerHTML; //ÕâÑùfirefox¾ÍÄÜʹÓÃinnerHTMLÁË

27¡¢eval()Óëwindow.execScript()Ö´Ðнű¾
IE¡¢firerox¾ùÖ§³Öeval()£¬firefox²»Ö§³Öwindow.execScript()

½â¾ö£ºÍ³Ò»Ê¹ÓÃeval()

28¡¢¶Ôʼþ´¦Àíº¯ÊýµÄÖØÐ´
½â¾ö£º£¨Àý£©:Èç¶ÔdocumentµÄonclick()ÖØÐ´£¬Í³Ò»Ê¹ÓÃdocument.onclick = function(){…}

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