CSSStyleDeclaration getPropertyValue() Method

Return the value of the color property:

var declaration = document.styleSheets[0].cssRules[0].style;
var propvalue = declaration.getPropertyValue("color");
alert(propvalue);

Description

The getPropertyValue() method returns the value of the specified CSS property.

Method
getPropertyValue()	Yes	9.0	Yes	Yes	Yes

object.getPropertyValue( propertyname)

Parameter	Description
propertyname	Required. A String representing the name of the property to check

DOM Version:	CSS Object Model
Return Value:	A String, representing the value of the property