function ValidateEmail( email )
{
	var atCharPresent = false;
	var dotPresent = false;

	for ( var Idx = 0; Idx < email.length; Idx++ )
	{
		if ( email.charAt ( Idx ) == '@' )
			atCharPresent = true;
		if ( email.charAt ( Idx ) == '.' )
			dotPresent = true;
	}

	if ( !atCharPresent || !dotPresent )
		return false;

	return true;
}

function validate()
{
	if (!checkapostophe(document.myform.txtName)) return false;
	if (!checkapostophe(document.myform.txtEmail)) return false;
	if (!checkapostophe(document.myform.txtComments)) return false;

	if (document.myform.txtName.value == "")
	{
		alert("Your Name cannot be blank");
		document.myform.txtName.focus();
		return false;
	}
	else
	{
		var valu4=eval('document.myform.txtName.value');
		var flag4;	
				
		if(valu4=="")
		{
			flag4=false;
		}
		
		instr=valu4.toString()
					
		for(var i=0;i<instr.length;i++)
		{
			var char1=instr.charAt(i)
			value=char1.charCodeAt()
			
			if(value=="32")
			{
				flag4=false;
			}
			else
			{
				flag4=true;
				break;
			}
		}
		
		if(flag4==false)
		{
			alert("Please enter a value for Your Name.");
			myform.txtName.focus();
			return(false);
		}
	
	}

	if (document.myform.txtEmail.value == "")
	{
		alert("Your Email cannot be blank");
		document.myform.txtEmail.focus();
		return false;
	}
	else 
	{
		if ( !ValidateEmail( document.myform.txtEmail.value ) )
		{
			alert( "Invalid Email " + document.myform.txtEmail.value );
			myform.txtEmail.focus();
			document.myform.txtEmail.value ="" ;
			return false;
		}
	}  		
	
	if (document.myform.txtComments.value == "")
	{
		alert("Your Comments cannot be blank");
		document.myform.txtComments.focus();
		return false;
	}
	else
	{
		var strComments;
		strComments= document.myform.txtComments.value;		
	
		if(strComments.length >= 8000)
		{
			alert("Maximum number of allowed characters exceeded.");
			document.myform.txtComments.focus();
			return false;
		}
	}
	
	if (document.myform.txtName.value != "")
	{	
		str = document.myform.txtName.value;
		str = str.toLowerCase();
		
		if(str.indexOf("<" + "script") != -1 || str.indexOf("http://") != -1 )
		{
			alert("wrong format");
			document.myform.txtName.focus();
			return false;
		}
	}
	
    if (document.myform.txtComments.value != "")
	{	
		str = document.myform.txtComments.value;
		str = str.toLowerCase();
		
		if(str.indexOf("<" + "script") != -1 || str.indexOf("http://") != -1 )
		{
			alert("wrong format");
			document.myform.txtComments.focus();
			return false;
		}
	}
	
	if ( document.myform.rndString && document.myform.txtrndString )
	{ 
		if ( document.myform.rndString.value != document.myform.txtrndString.value )
		{			
			alert("Please Insert Correct Value.")
			document.myform.txtrndString.focus();
			return false;
		}
	}

	return true;
}