SET CSS USING JAVASCRIPT

function setSCC(){
     
                var element=document.getElementById("add");                element.className='btn_disable'; 
                element.style.height="100px";
                element.style.width="200px";
                element.disable=true;


}




Note : Above function can get the element having id="add". and it will set its css class to "btn_disable" and will set it height and width as specified , as well as it will disable the button.
u should have the css included in your page.


common.css
--------------------


.btn_disable
{
      font-family: Arial;
font-size:10pt;
height:30px;
       background-color:gray;
      color:red;
}