function getCSSRule(ruleName, deleteFlag){
   ruleName=ruleName.toLowerCase();
   if (document.styleSheets){
                     
      for (var i=0; i<document.styleSheets.length; i++){
         var styleSheet=document.styleSheets[i];          
         var ii=0;                                        
         var cssRule=false;                             
         do{                                             
            if (styleSheet.cssRules){                    
               cssRule = styleSheet.cssRules[ii];        
            }else{                                      
               cssRule = styleSheet.rules[ii];            
            }
             
            if(cssRule){  
            alert(cssRule.selectorText);                            
               if(cssRule.selectorText.toLowerCase()==ruleName){ 
                  if (deleteFlag=='delete'){             
                     if (styleSheet.cssRules){           
                        styleSheet.deleteRule(ii);       
                     }else{                             
                        styleSheet.removeRule(ii);        
                     }                                   
                     return true;                        
                  }else{    
                                                       
                     return cssRule;                      
                  }                                       
               }                                          
            }                                             
            ii++;                                         
         } while(cssRule)                                
      }                                                   
   }                                                     
   return false;                                         
}  

function changeCase(){
   document.body.style.fontsize = "12px";
}