þÿfunction chkValid(form)

		{

			

			if(form.txtMessage.value=="")

			{

				alert('No message text provided.');

				form.txtMessage.focus();

				return false;

			}

			if(form.name.value=="" && form.from.value=="")

			{

				alert('Please enter your name and email address');

				form.name.focus();

				return false;

			}

			if(form.name.value=="")

			{

				alert('Please enter your name');

				form.name.focus();

				return false;

			}

			if(form.from.value=="")

			{

				alert('Please enter your email address');

				form.from.focus();

				return false;

			}

			if (echeck(form.from.value)==false){

				form.from.value="";

				form.from.focus();

				return false;

			}



			return true;

			

		}

		function echeck(str) {



			var at="@"

			var dot="."

			var lat=str.indexOf(at)

			var lstr=str.length

			var ldot=str.indexOf(dot)

			if (str.indexOf(at)==-1){

			   alert("Enter valid e-mail address")

			   return false;

			}



			if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){

			   alert("Enter valid e-mail address");

			   return false;

			}



			if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){

			    alert("Enter valid e-mail address")

			    return false;

			}



			 if (str.indexOf(at,(lat+1))!=-1){

			    alert("Enter valid e-mail address");

			    return false;

			 }



			 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){

			    alert("Enter valid e-mail address ");

			    return false;

			 }



			 if (str.indexOf(dot,(lat+2))==-1){

			    alert("Enter valid e-mail address");

			    return false;

			 }

			

			 if (str.indexOf(" ")!=-1){

			    alert("Enter valid e-mail address");

			    return false;

			 }



	 		 return true;				

		}