function countChar()
   {
   var c=document.getElementById("tweetArea").value.length;
   document.getElementById("sCount").innerHTML=140-c ;
   var cc=140-c;
  	if (Number(cc)<0) {
	 document.getElementById("counter").style.color="#E80000";
	} else if (Number(cc)<15) {
	 document.getElementById("counter").style.color="#FF9900";
	} else {
	 document.getElementById("counter").style.color="#3a3a3a";
	}
   }