// 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 (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
		 }
				
	}