8. A non-transitory computer-readable storage medium containing executable computer programs, when executed by a computer, performing a skin replacement method for skin replacement process of a webpage content area displayed in a browser of a mobile terminal, the method comprising: defining, by a browser client, a self-defined Cascading Style Sheet (CSS) property or a self-defined Hypertext Markup Language (HTML) element property via extending CSS properties or HTML element properties; storing a skin style library on a browser client, the skin style library containing skin style information that corresponds to one or more skin effects, respectively, wherein the skin style information that corresponds to each skin effect of the one or more skin effects is associated with one or more indexes, respectively; during creating of webpage content of a webpage, adding, by a webpage content writer, the self-defined CSS property or the self-defined HTML element property to an element in the webpage content, wherein a value of the self-defined CSS property or of the self-defined HTML element property represents an index for the skin style information of the element in the skin style library; after a skin effect of the one or more skin effects is selected by a user of the browser client, when the user of the browser client requests the webpage, parsing the webpage content received from a web server, to find the self-defined CSS property or the self-defined HTML element property in the element in the webpage content; according to the value of the CSS property or of the self-defined HTML element property, searching in the skin style library on the browser client, to find the skin style information corresponding to the index and the selected skin effect; and rendering the element in the webpage content using the found skin styles, wherein the skin style library is edited by at least one of the browser client and the webpage content writer, and the user of the browser client does not directly edit the skin style library, wherein: a skin effect of the one or more skin effects includes specified skin style associated with the one or more indexes and specified style of a browser skin, wherein the browser skin includes skins of one or more user interface widgets in a shell part of the browser client, and the method further comprises switching to another skin effect of the one or more skin effects, including: in the skin style library on the browser client, finding a second skin style information corresponding to the another skin effect and based on the index for the element; rendering the element in the webpage content using the found second skin style information; and changing the browser skin to a second specified skin style corresponding to the another skin effect, such that the another skin effect in the shell part of the browser client is directly and seamlessly integrated with the element in the webpage content displayed in the browser.
8. A non-transitory computer-readable storage medium containing executable computer programs, when executed by a computer, performing a skin replacement method for skin replacement process of a webpage content area displayed in a browser of a mobile terminal, the method comprising: defining, by a browser client, a self-defined Cascading Style Sheet (CSS) property or a self-defined Hypertext Markup Language (HTML) element property via extending CSS properties or HTML element properties; storing a skin style library on a browser client, the skin style library containing skin style information that corresponds to one or more skin effects, respectively, wherein the skin style information that corresponds to each skin effect of the one or more skin effects is associated with one or more indexes, respectively; during creating of webpage content of a webpage, adding, by a webpage content writer, the self-defined CSS property or the self-defined HTML element property to an element in the webpage content, wherein a value of the self-defined CSS property or of the self-defined HTML element property represents an index for the skin style information of the element in the skin style library; after a skin effect of the one or more skin effects is selected by a user of the browser client, when the user of the browser client requests the webpage, parsing the webpage content received from a web server, to find the self-defined CSS property or the self-defined HTML element property in the element in the webpage content; according to the value of the CSS property or of the self-defined HTML element property, searching in the skin style library on the browser client, to find the skin style information corresponding to the index and the selected skin effect; and rendering the element in the webpage content using the found skin styles, wherein the skin style library is edited by at least one of the browser client and the webpage content writer, and the user of the browser client does not directly edit the skin style library, wherein: a skin effect of the one or more skin effects includes specified skin style associated with the one or more indexes and specified style of a browser skin, wherein the browser skin includes skins of one or more user interface widgets in a shell part of the browser client, and the method further comprises switching to another skin effect of the one or more skin effects, including: in the skin style library on the browser client, finding a second skin style information corresponding to the another skin effect and based on the index for the element; rendering the element in the webpage content using the found second skin style information; and changing the browser skin to a second specified skin style corresponding to the another skin effect, such that the another skin effect in the shell part of the browser client is directly and seamlessly integrated with the element in the webpage content displayed in the browser. 12. The non-transitory computer-readable storage medium according to claim 8 , wherein source code of the element includes: a start tag of the element, wherein the start tag sequentially includes therein a tag name of the start tag, an HTML style attribute, the self-defined CSS property, and the value of the self-defined CSS property; or sequentially, a style start tag, a selector corresponding to the element, the self-defined CSS property, the value of the self-defined CSS property, and a style end tag corresponding to the style start tag.