// JavaScript Document By Mamoon Rashid 

function CheckForm()

{

	with(document.form)

	{

			if(name.value == "")

			{

				alert("Enter Your Name");

				name.focus();

				return false;

			}

				

				if ((email.value==null)||(email.value=="")){

					alert("Please Enter your Email ID")

					email.focus()

					return false

				}

				if (echeck(email.value)==false){

					email.value=""

					email.focus()

					return false

				}
				if (telephone.value == '') 

				{

					alert('Please Enter Your Telephone No.');

			  		telephone.focus(); 	

  	  				return false;

				}

				if (msg.value == '') 

				{

				alert('Please Enter Your Message');

			  	msg.focus(); 	

  	  			return false;

				}

	}

}
/*
function CheckForm()

{

	with(document.form)

	{

			if(name.value == "")

			{

				alert("Enter Your Name");

				name.focus();

				return false;

			}

				

				if ((email.value==null)||(email.value=="")){

					alert("Please Enter your Email ID")

					email.focus()

					return false

				}

				if (echeck(email.value)==false){

					email.value=""

					email.focus()

					return false

				}

				if (msg.value == '') 

				{

				alert('Please Enter Your Message');

			  	msg.focus(); 	

  	  			return false;

				}

	}

}
*/
 

 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("Invalid E-mail ID")

		  return false

		}



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

		  alert("Invalid E-mail ID")

		  return false

		}



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

		  alert("Invalid E-mail ID")

		  return false

		}



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

		  alert("Invalid E-mail ID")

		  return false

		 }



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

		  alert("Invalid E-mail ID")

		  return false

		 }



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

		  alert("Invalid E-mail ID")

		  return false

		 }

		

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

		  alert("Invalid E-mail ID")

		  return false

		 }

				

	}