function validateForm(str)
  {
    validate_string = "";
    if(str.Name.value=="")
    {
		if( validate_string == "")
		str.Name.focus();
	  validate_string+="Please Enter Name!\n";
	  
	  
	}
   if(!isNaN(str.Name.value) && str.Name.value!="")
    {
		if( validate_string == "")
		str.Name.focus();
	  validate_string+="Please Enter Characters For Name!\n";
	  
	  
	}
   if(str.Email.value=="")
    {
		if( validate_string == "")
		str.Email.focus();
	
	  validate_string+="Please Enter Email!\n";
	   
	}
   else if(str.Email.value.indexOf("@")<1 || str.Email.value.indexOf(".")<1)
    {
		if( validate_string == "")
		str.Email.focus();
	  validate_string+="Please Enter Valid Email!\n";
	
	  
	}
 if(str.From.value=="")
    {
		if( validate_string == "")
		str.From.focus();
	  validate_string+="Please Enter Arrival Date!\n";
	 
	}
	
	
if(str.Other_Requests.value.indexOf("http://")>=0 || str.Other_Requests.value.indexOf(".com")>=0)
   {
	if( validate_string == "")
	str.Other_Requests.focus();
	validate_string+="Sorry you can't place URL here.\n";
   
	}
	
	
 if(str.txtnumber.value=="")
    {
		if( validate_string == "")
		str.txtnumber.focus();
	  validate_string+="Please Enter Verification Code!\n";
	 
	}
	else if(str.txtnumber.value!=str.rendomnumber.value)
	{
		if( validate_string == "")
		str.txtnumber.focus();
	  validate_string+="Wrong code, Please enter valid code!\n";
	}
	
	if(validate_string!="")
	 {
	  alert(validate_string);
	  return false;
	 }
	else
	 {
	   return true;
	 }  
 }
 
 function rand()

{

    var chars = "K1GgM2w3rTt45tg6hH7dg8dJg9dLgdGa27Tk4L5b2Nmi8YQ1kgj6B52MDh4yr91LF1";
	var string_length = 6;
	var ranNum = '';
	for (var i=0; i<string_length; i++) {
		var rnum = Math.floor(Math.random() * chars.length);
		ranNum += chars.substring(rnum,rnum+1);
	}
    document.email.rendomnumber.value= ranNum;
	document.num_image.src="randomImage.php?number="+ranNum;

}