function validateform(form)
{
	if(form.txtfname.value=="")
	{
		alert("First name is required");
		form.txtfname.focus();
		return false;
	}
	if(form.txtlname.value=="")
	{
		alert("Last name is required");
		form.txtlname.focus();
		return false;
	}
	if(form.txtadd.value=="")
	{
		alert("Address is required");
		form.txtadd.focus();
		return false;
	}
	if(form.txtnum.value=="")
	{
		alert("	Post number is required");
		form.txtnum.focus();
		return false;
	}
	
	if(form.textnumber.value=="")
	{
		alert("Number of people is required");
		form.textnumber.focus();
		return false;
	}
	
	if(checkEmail(form.textemail.value)==0)
	{
		memsg="Invalid Email ! \n";
		memsg=memsg + "Please Enter the Valid Email Address\n";
		alert(memsg);
		form.textemail.focus();
		return false;
		
	}
	return true;
	
}




 
 function checkEmail()
 	{
 	var strEmail, strError, countAtRate, countDot, i;
 	var checkAtRate, checkDot;
 	var ValidChars,CountValidChars;
 	ValidChars="abcdefghijklmnopqrstuvwxyz0123456789_.@ABCDEFGHIJKLMNOPQRSTUVWXYZ-";
 	strEmail = checkEmail.arguments[0];
 	countAtRate=0;
 	countDot=0;
 	CountValidChars=0;
 	if (strEmail.length >= 7)
 		{
 		for(i=0;i<strEmail.length;i++)
 			{
 			if(strEmail.charAt(i)=="@")
 				countAtRate++;
 			if(strEmail.charAt(i)==".")
 				countDot++;
 			CountValidChars=0;
 			for(j=0;j<ValidChars.length;j++)
 				{
 				if(strEmail.charAt(i)==ValidChars.charAt(j))
 					{
 					CountValidChars++;
 					}
 				}
 			if(CountValidChars==0)
 				{
 				strError=0;
 				break;
 				}
 			}
 		}
 	checkAtRate=strEmail.indexOf("@",1);
 	checkDot=strEmail.indexOf(".",1);
 	for(i=1;i<countDot;i++)
 		checkDot=strEmail.indexOf(".",checkDot+1);
 	if(countAtRate==1 && countDot > 0 && strEmail.length >=7 && strError != 0)
 		strError=1;
 	else
 		strError=0;
 	if(checkDot>=strEmail.length-2)
 		strError=0;
 	if(strEmail.charAt(0)=="@" || strEmail.charAt(strEmail.length-1)=="@")
 		strError=0;
 	if(strEmail.charAt(0)=="." || strEmail.charAt(strEmail.length-1)==".")
 		strError=0;
 	if(checkDot < checkAtRate)
 		strError=0;
 
 	return strError;
}