Setting a Whole Style String to an Element from JavaScript (Not Individual Style Parameters)

setting a whole style string to an element from javascript (not individual style parameters)

How about the .style.cssText property? Here's Microsoft's explanation.

Throw it the styles you'd like to apply like so:

document.getElementById('myEl').style.cssText = 'float:left;margin-top:75px;';

As for browser support, although it was IE-proprietary I believe it's well-supported (works in the IEs, FF3, and Safari 3.2 WIN at least).

Set CSS Property by string with JavaScript

The "proper way" is using setProperty or setPropertyValue:

element.style.setProperty("background-color", "red");
element.style.setPropertyValue("background-color", "red");

They behave the same, the only difference is that setProperty accepts an optional third argument to set !important priority.

However, for convenience, the CSSStyleDeclaration interface is extended by partial interfaces in order to allow to get or set the values of supported CSS properties using IDL camel-case attributes.

That means you can also use

element.style.backgroundColor = "red";
element.style["backgroundColor"] = "red";

Changing element style attribute dynamically using JavaScript

It's almost correct.

Since the - is a javascript operator, you can't really have that in property names. If you were setting, border or something single-worded like that instead, your code would work just fine.

However, the thing you need to remember for padding-top, and for any hyphenated attribute name, is that in javascript, you remove the hyphen, and make the next letter uppercase, so in your case that'd be paddingTop.

There are some other exceptions. JavaScript has some reserved words, so you can't set float like that, for instance. Instead, in some browsers you need to use cssFloat and in others styleFloat. It is for discrepancies like this that it is recommended that you use a framework such as jQuery, that handles browser incompatibilities for you...

How to apply CSS string using Javascript/jQuery without parsing/tokenizing to retrieve property-value pairs?

You can retrieve the existing style attribute and then set a new one:

var target = $("#target");
target.attr("style", target.attr("style") + "; " + yourString);

Live Example | Source

How to get an HTML element's style values in JavaScript?

The element.style property lets you know only the CSS properties that were defined as inline in that element (programmatically, or defined in the style attribute of the element), you should get the computed style.

Is not so easy to do it in a cross-browser way, IE has its own way, through the element.currentStyle property, and the DOM Level 2 standard way, implemented by other browsers is through the document.defaultView.getComputedStyle method.

The two ways have differences, for example, the IE element.currentStyle property expect that you access the CCS property names composed of two or more words in camelCase (e.g. maxHeight, fontSize, backgroundColor, etc), the standard way expects the properties with the words separated with dashes (e.g. max-height, font-size, background-color, etc).

Also, the IE element.currentStyle will return all the sizes in the unit that they were specified, (e.g. 12pt, 50%, 5em), the standard way will compute the actual size in pixels always.

I made some time ago a cross-browser function that allows you to get the computed styles in a cross-browser way:

function getStyle(el, styleProp) {
  var value, defaultView = (el.ownerDocument || document).defaultView;
  // W3C standard way:
  if (defaultView && defaultView.getComputedStyle) {
    // sanitize property name to css notation
    // (hypen separated words eg. font-Size)
    styleProp = styleProp.replace(/([A-Z])/g, "-$1").toLowerCase();
    return defaultView.getComputedStyle(el, null).getPropertyValue(styleProp);
  } else if (el.currentStyle) { // IE
    // sanitize property name to camelCase
    styleProp = styleProp.replace(/\-(\w)/g, function(str, letter) {
      return letter.toUpperCase();
    });
    value = el.currentStyle[styleProp];
    // convert other units to pixels on IE
    if (/^\d+(em|pt|%|ex)?$/i.test(value)) { 
      return (function(value) {
        var oldLeft = el.style.left, oldRsLeft = el.runtimeStyle.left;
        el.runtimeStyle.left = el.currentStyle.left;
        el.style.left = value || 0;
        value = el.style.pixelLeft + "px";
        el.style.left = oldLeft;
        el.runtimeStyle.left = oldRsLeft;
        return value;
      })(value);
    }
    return value;
  }
}

The above function is not perfect for some cases, for example for colors, the standard method will return colors in the rgb(...) notation, on IE they will return them as they were defined.

I'm currently working on an article in the subject, you can follow the changes I make to this function here.

Creating a p element and changing style in same function

You put the ID as "cursorText", instead of "para".

Also, I would personally recommend you create a CSS class, and set the class attribute on the new object to match that CSS class with all of the changes you want to make to the newly created paragraph.

Setting element styles with javascript in firefox

Use: parent.style.paddingRight = '100px';

jsFiddle example

Or parent.setAttribute('style', 'padding-right:100px;');

jsFiddle example

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