Michael Winter wrote:
On 05/05/2006 09:31, RobG wrote: // If dom set to false, use IE method to add element
if (!dom){
try {
oRadio = document.createElement('<input type="radio"'
+ ' name="' + grpName + '">');
form.appendChild(oRadio);
} catch (e){ e = true;}
[snip]
An alternative version that avoids exception handling could look
something like:
/* Takes three arguments and returns a boolean to indicate
* success (true) or failure (false).
*
* groupName - Name used for the new radio button group.
* quantity - Number of radio buttons to add.
* container - Reference to a block-level element, to
* which the new controls will be added.
*/
var addRadioButtons = function() {
function create(name) {
var element = document.createElement('input');
if (element) {
element.name = name;
element.type = 'radio';
}
return element;
}
/* If the host is IE, the function declaration below
* will override the one above.
*/
/*@cc_on @*/
/*@if (@_jscript)
function create(name) {
return document.createElement('<input type="radio" name="'
+ name + '">');
}
@end @*/
[...]
Here is a more general solution to this problem:
/**
* Creates an element of the type specified, using the
* <code>document.createElement()</code> method if supported.
* This method works with MSIE, too, for if JScript is used,
* it is tried to use the start tag as is instead of passing
* only the element type, and adding properties later.
*
* @author
* (C) 2004, 2006 Thomas Lahn <dh******@PointedEars.de>
* @partof
*
http://pointedears.de/scripts/dhtml.js
* @param sTag : string
* Start tag or element type of the element to be created.
* Passing a start tag even works if the UA is not MSIE,
* as attributes and values given are parsed from left to
* right into the corresponding element object properties.
* @return type object
* A reference to a new <code>Element</code> object with the
* <code>nodeName</code> property set to <code>sTagName</code>,
* and the <code>localName</code>, <code>prefix</code>,
* and <code>namespaceURI</code> properties set to
* <code>null</code>.
* @see
* @link{dom2-core#ID-2141741547},
* @link{msdn#workshop/author/dhtml/reference/methods/createelement.asp}
*
http://pointedears.de/scripts/JSdoc/
*/
function createElement(sTag)
{
var o = null;
if (sTag
&& typeof document != "undefined"
&& dhtml.isMethod(document.createElement))
{
/*@cc_on @*/
/*@if (@_jscript)
o = document.createElement(sTag);
@end @*/
if (!o)
{
var aTagComponents = sTag.replace(/^<?\s*|\s*>?$/g, "")
.replace(/\s+/, " ").replace(/ = /g, "=").split(" ");
o = document.createElement(aTagComponents[0]);
if (o)
{
aTagComponents.shift();
var attrs = aTagComponents.join(" ");
var m;
while ((m = /([^\s=]+)\s*(=\s*(\S+)\s*)?/g.exec(attrs)))
{
setAttr(o, m[1].toLowerCase(), m[3]);
}
}
}
}
return o;
}
/**
* Sets the value of an attribute of an HTMLElement object.
*
* @author
* (C) 2003, 2006 Thomas Lahn <dh******@PointedEars.de>
* @partof
*
http://pointedears.de/scripts/dhtml.js
* @param sAttrName: string
* Name of the attribute for which the value should be set.
* Attribute names for which an ECMAScript language binding
* is defined in W3C DOM Level 2 HTML, are automatically
* mapped to the corresponding element object property.
* All attribute names are automatically mapped to their
* camelCased equivalent.
*
* Semicolon-separated style property declarations (in
* form of colon-separated name-value pairs each) of a
* <code>style</code> attribute value are mapped to the
* corresponding properties of the object referenced by
* the <code>style</code> property of the element object.
* Declarations are evaluated from left to right, where
* property values complement or replace the previously
* defined ones.
* @param attrValue
* Value of the attribute to be set. The value is
* converted to number if it can be interpreted as such.
* @returns
* The value of the attribute of the element object;
* a null-string if no matching object exists or if the DOM
* does not provide retrieval of the attribute's values.
*/
function setAttr(o, sAttrName, attrValue)
{
var result = "";
if (o && sAttrName)
{
var attrMap = {
alink: "aLink",
accesskey: "accessKey",
bgcolor: "bgColor",
cellpadding: "cellPadding",
cellspacing: "cellSpacing",
"char": "ch",
charoff: "chOff",
"class": "className",
codebase: "codeBase",
codetype: "codeType",
datetime: "dateTime",
frameborder: "frameBorder",
htmlfor: "htmlFor",
ismap: "isMap",
longdesc: "longDesc",
maxlength: "maxLength",
marginheight: "marginHeight",
marginwidth: "marginWidth",
nohref: "noHref",
noresize: "noResize",
noshade: "noShade",
nowrap: "noWrap",
readonly: "readOnly",
rowspan: "rowSpan",
tabindex: "tabIndex",
usemap: "useMap",
valuetype: "valueType",
vlink: "vLink"
};
// camel-case specific attribute names
if (typeof attrMap[sAttrName] != "undefined")
{
sAttrName = attrMap[sAttrName];
}
var
hyphenatedToCamelCase = function(s)
{
return s.replace(
/-([a-z])/g,
function(match, p1, offset, input)
{
return p1.toUpperCase();
})
},
strToValue = function(s)
{
s = s.replace(/^["']|["']$/g, "");
return isNaN(s) ? s : +s;
};
// camel-case hyphenated attribute names
sAttrName = hyphenatedToCamelCase(sAttrName);
if (typeof attrValue != "undefined")
{
attrValue = strToValue(attrValue);
if (sAttrName == "style" && typeof attrValue == "string")
{
var styleProps = attrValue.split(/\s*;\s*/);
for (var j = 0, len = styleProps.length; j < len; j++)
{
var
stylePair = styleProps[j].split(/\s*:\s*/),
stylePropName = stylePair[0].toLowerCase(),
stylePropVal = stylePair[1];
dhtml.setStyleProperty(o,
hyphenatedToCamelCase(stylePropName),
strToValue(stylePropVal));
}
}
else
{
result = o[sAttrName] = attrValue;
}
}
else if (!(o[sAttrName] = true))
{
result = o[sAttrName] = sAttrName;
}
}
return result;
}
PointedEars
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