IE跟Firefox浏览器下javascript、CSS兼容性研究

IE和Firefox浏览器下javascript、CSS兼容性研究

obj.firstChild/.lastChild/.nextSibling/.childNodes/.previousSibling should be changed.

Some functions exist in IE and Firefox, but they might implementdifferent functionality, you can change them into our predefined function in SalIEFirefox.js.

Not compatible:

var wrongGet = obj.firstChild;

var wrongGet = obj.lastChild;

var wrongGet = obj.nextSibling;

var wrongGet = obj.childNodes;

var wrongGet = obj.previousSibling;

Compatible

var rightGet = getFirstChild(obj)

var rightGet = getLastChild(obj)

var rightGet = getNextSibling(obj)

var rightGet = getChildNodes(obj)

var rightGet = getPreviousSibling(obj)

Assign a property “id” to HTML element if it miss “id”

Add “id” for every HTML element, because if there is only “name”for HTML element, IE will assign the “name” value to “id”, but Firefox willnot.

Not compatible:

tmpHtml.Append("<input type=/"text/"name=/"" + str1 + "/"value=/"0/">");

Compatible:

tmpHtml.Append("<input type=/"text/"name=/"" + str1 + "/" id=/"" + str1 + "/" value=/"0/">");

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1. Keep parameters case-sensitive between file.js and file.cs

It is case-sensitive for HTML element’s idand any parameter in Firefox

Not compatible:

.js var tableDrag=document.getElementById(SectionId+"_dataTable");

.cs?????? sbdTempHtml.Append("<table id=/"" + SectionId + "_datatable/">");

Compatible:

.js var tableDrag=document.getElementById(SectionId+"_dataTable");

.cs?????? sbdTempHtml.Append("<table id=/"" + SectionId + "_dataTable/">");

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1. Using getElementById(objId) to get a object instead of eval(objId)

Don’t use “eval” to cast a string to Object, in other words, usingGetElementById(strObjId) instead of eval(strObjId)

Not compatible:

objField1 = eval("document.mainform.meritid"+ i);

Compatible:

objField1 = document.getElementById("document.mainform.meritid"+ i);

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You should be careful of the following:

Compatible:

var objAjax = eval("SalaryCom.CompPlanner.CppElementScripts."+ document.mainform.aaa.value);

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1. Add <tr> between <thead>and<th>

Add <tr> between <thead>and<th>, because in IE itwill auto add <tr> for it, but Firefox will not. Then when you are tryingto get some element using obj.parentNode() might be different.

Not compatible:

sbdTempHtml.Append("<table>");

sbdTempHtml.Append("<thead>");

sbdTempHtml.Append("<thwidth=/"100/">test field name 1</th>");

sbdTempHtml.Append("<thwidth=/"200/">test field name 2</th>");

sbdTempHtml.Append("</thead>");

sbdTempHtml.Append("<table>");

Compatible:

sbdTempHtml.Append("<table>");

sbdTempHtml.Append("<thead>");

sbdTempHtml.Append("<tr>");

sbdTempHtml.Append("<thwidth=/"100/">test field name 1</th>");

sbdTempHtml.Append("<thwidth=/"200/">test field name 2</th>");

sbdTempHtml.Append("</tr>");

sbdTempHtml.Append("</thead>");

sbdTempHtml.Append("<table>");

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1. Change aRows(i).cells to aRows[i].cells

Not compatible:

aRows(i).cells

Compatible:

aRows[i].cells

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1. Using standard way to get/set customized value

Using the following standard way to get/setcustomized value for HTML element.

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Not compatible:

var str = Obj.customizedvalue;

Compatible:

var str = Obj.getAttribute(“customizedvalue”);

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1. Using standard way to remove an option.

Using the following standard way to remove anoption in selected element.

Not compatible:

oSel.options.remove(oSel.selectedIndex);

Compatible:

oSel.remove(oSel.selectedIndex);

Firefox doesn’t support Expression in style file.

Not compatible:

top: expression(parentNode.parentNode.parentNode.parentNode.scrollTop);

width:expression(document.getElementById('CenterDIV').offsetWidth-16+'px');

Compatible:

??????? Consider to use JS method instead of usingexpression in css.

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1. Change the event onmouseleave() to onmouseout()

There is no event of onmouseleave() in Firefox, you should changeit to onmouseout(),but be careful to change it like following

Not compatible:

div.attachEvent("onmouseleave",new Function("clearPopUpMenu();"));

Compatible:

div.attachEvent("onmouseout",new Function("clearPopUpMenu();"));

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1. Change obj.fireEvent(eventname) to fireEvent(obj,eventname)

There is no method obj.fireEvent() inFirefox, you should change it to following:

Not compatible:

div.fireEvent("onscroll");

Compatible:

fireEvent(div,"onscroll");

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1. Don’t use the command document.readyState!="complete"

Firefox doesn’t support this command document.readyState!="complete"

Not compatible:

????????????? if (document.readyState!="complete")

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1. Don’t use window.createPopup()

Don’t use window.createPopup() method tocreate a popup window.

Not compatible:

?????????? window.createPopup();

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1. Change document.body.scrollLeft to document.documentElement.scrollLeft

There are some differences between body.scrollLeft and other HTMLelement(documentElement.scrollLeft), you should care about it.

Not compatible:

var _left = document.body.scrollLeft;

Compatible:

var_left = document.documentElement.scrollLeft;

??????

you should be careful of the following propertys which should bealso applied in:

scrollHeight|scrollLeft|scrollTop|scrollWidth

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1. Firefox dosen’t support filter property

A file Cppu_ColorGradient.js can resolve the problem, include thefile in Cppb_Header.ascx.cs and do something such as set classname and getclient color and so on…

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1. Add a postfix ‘px’ to specify the width/height or position

Not compatible:

document.GetElementById(strObjId).style.width = 10;

Compatible:

document.GetElementById(strObjId).style.width= ‘10px’;

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you should be careful of the following propertys which should bealso applied in (you can ignore if it is a read only property).

width|height|right|left|scrollHeight|scrollWidth|scrollLeft|scrollTop|offsetHeight|offsetWidth|offsetLeft|offsetTop|clientHeight|clientWidth|clientLeft|clientTop|lineHeight|lineWidth

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1. Change style=”cursor:hander” to style=”cursor:pointer”

Not compatible:

style=”cursor:handerCompatible:

style=”cursor:pointer”

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1. Don’t forget propertys “title” and “alt” for img element

You should assign “title” and “alt” property for img element.Because it will atuo assign “alt” value to “title” property in IE, while itwill not in Firefox.

Not compatible:

sbdTempHtml.Append("<img src=/"../Graphics/i_expand.gif/"/></div>");

Compatible:

sbdTempHtml.Append("<img alt=/"/"title=/"/" src=/"../Graphics/i_expand.gif/"/></div>");

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1. FireFox do not support the style “display:block” into <tr>

we are using display:block on tr tag which is not correct in Firefox.After applying display:block, the layout of the table is broken. The defaultstyle for tr in Firefox should be ‘display:table-row’

Not compatible:

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

Compatible:

if(window.isIE)

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

else

document.getElementById("hrmtr").style.display = "";

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1. Don’t forget setting opacity for firefox

It is only applied in IE if you set opacityas “filter:alpha(opacity=50);”,

Not compatible:

filter:alpha(opacity=50);

Compatible:

filter:alpha(opacity=50);

-moz-opacity:0.5; /*css*/

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/*The way in js*/

if (!window.isIE)

obj.style.MozOpacity = 0.5;

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1. Have browsers IE and FireFox compatible in .css

If you want to have browsers IE & FireFox compatible in .css,you should copy a line and prefixed “*”, and the line must be under theoriginal line, then Firefox is hight priority automatically, IE will ignore itand only process a line prefixed “*”.

Not compatible:

margin:10px;

Compatible:

?margin:20px; /*for firefox*/

? *margin:10px;??? /*for ie7,ie6*/