var blockNumber=0;
					setInterval ( "doSomething()", 10000 );
					
					function doSomething ()
					{	
						//alert(tabNumber);
						showHideDiv(blockNumber);
						if(blockNumber==0) blockNumber=1;
						else blockNumber=0;
					  // (do something here)
					}	
					function showHideDiv(flag){
						var divBlock=document.getElementById('shdiv').getElementsByClassName('slideContent');
						//alert(divBlock.length)
						if(flag==0){
							divBlock[flag].style.display="block";
							divBlock[flag+1].style.display="none";
						}
						else if(flag==1){
							divBlock[flag].style.display="block";
							divBlock[flag-1].style.display="none";
						}
					}