function checksubmit()

{

	if(document.sendmessage.phoneno.value=="")

	{

		alert("Please Enter Mobile Number of Recipient")

		document.sendmessage.phoneno.focus();

		return false;

	}	

	if(document.sendmessage.message.value=="")

	{

		alert("Please Enter Message")

		document.sendmessage.message.focus();

		return false;

	}

	if(document.sendmessage.fromno.value=="")

	{

		alert("Please Enter your Name or Phone No in From field")

		document.sendmessage.fromno.focus();

		return false;

	}

	if(document.sendmessage.verif_box.value=="")

	{

		alert("Please Enter Image Code")

		document.sendmessage.verif_box.focus();

		return false;

	}

	

}

function checkchar()

{

	var text1=document.sendmessage.message.value;

	var textlength=text1.length;

	if(textlength>140)

	{

		alert("You Can Enter Maximum 140 Characters Only");

		return false;

	}

}

function IsNumeric(sText)

{

   var ValidChars = "0123456789";

   var IsNumber=true;

   var Char;

   for(i = 0; i < sText.length && IsNumber == true; i++) 

   { 

		 Char = sText.charAt(i); 

		 if (ValidChars.indexOf(Char) == -1) 

         {

	         IsNumber = false;

         }

      }

   return IsNumber;

}

function checkphoneno(frm)

{

	var inputvalue=frm;

	var errormsg;

	var filename1 = document.sendmessage [inputvalue].value;

	if (!IsNumeric(filename1))

	{

		if(frm=='phoneno')

		{

			errormsg="Please provide a valid Mobile No. in To Field";

		}

		if(frm=='fromno')

		{

			errormsg="Please provide a valid Mobile No. in From field";

		}		

		alert(errormsg)

		document.sendmessage [inputvalue].focus();;

		document.sendmessage [inputvalue].value='';

		return false;

	}

	return true;

}