Alguien me puede ayudar con este problema

hola a todos, tengo un poblemita, estoy creando una pagina web, parecida a la del millón de dolares, donde las personas pueden comprar pixeles publicitarios en bloques de 10x10, el problema es el siguiente.

quiero crear una pagina solo para república dominicana, pero el scrip que he descargado esta basado en la moneda de estados unidos, cuando se ingresan los parámetros altura y ancho el programa calcula automáticamente el precio, pero lo que quiero es que me calcule otro precio...

pueden entrar al siguiente link para que entiendan lo que le explico http://dosmillones.hol.es/buy.php
y reyenen los campos Width y Height automaticamente te tirara el precio al final donde dise price, lo que quiero es modificar ese precio...

aqui les dejo el codigo....

<?php
include("header.php");
include("inner_header.php");
include("includes/configure.php");
include("includes/database_tables.php");

$x1=substr($_POST['x'],0,-1);
$y1=substr($_POST['y'],0,-1);

if($x1=="") $x1=0;
if($y1=="") $y1=0;

$q_block_price = mysql_query("SELECT block_price FROM " . TABLE_CONFIGURATION . " WHERE id=1");
$f_block_price = mysql_fetch_assoc($q_block_price);
$block_price = $f_block_price["block_price"];


?>

<script src="includes/general.js" language="JavaScript">

</script>
<script language="JavaScript">

function chk_form()
{


var flg = 1;
var str = "Please fill the following fields:\t";
str += "\n----------------------------------";

if((document.add_img_frm.name.value)==""){
str += "\n Name";
flg = 0;
}
if((document.add_img_frm.email.value)==""){
str += "\n Email";
flg = 0;
}
if((document.add_img_frm.width.value)==""){
str += "\n Width";
flg = 0;
}
if((document.add_img_frm.height.value)==""){
str += "\n Height";
flg = 0;
}
if((document.add_img_frm.url.value)==""){
str += "\n URL";
flg = 0;
}
if((document.add_img_frm.title.value)==""){
str += "\n Title";
flg = 0;
}
if((document.add_img_frm.upload_img.value)==""){
str += "\n Image";
flg = 0;
}

if(flg == 0){
alert(str);
return false;
}else{
if(!isValidEmail(document.add_img_frm.email.value)){
alert("Please check your email");
document.add_img_frm.email.focus();
return false;
}
if(isNaN(document.add_img_frm.width.value)){
alert("Widht field must be numeric");
return false;
}
if(isNaN(document.add_img_frm.height.value)){
alert("Height field must be numeric");
return false;
}

if(!chk_url(document.add_img_frm.url)){
return false;
}

//--------------------------------------------------------------------

if(document.getElementById('width').value <= 0){
alert("Width must greater than 0");
return false;
}
if(document.getElementById('height').value <= 0){
alert("Height must greater than 0");
return false;
}

var x1_val = document.add_img_frm.x1.value;
var y1_val = document.add_img_frm.y1.value;
var avail_x_dist = 100 - x1_val;
var avail_y_dist = 100 - y1_val;
if(document.add_img_frm.width.value > avail_x_dist){
alert("Horigental Blocks are not available.");
return false;
}
if(document.add_img_frm.height.value > avail_y_dist){
alert("Vertical Blocks are not available.");
return false;
}

var total_block = document.getElementById('width').value*document.getElementById('height').value;
var block_price = document.getElementById('block_price').value;
var total_amount = total_block*block_price;
document.getElementById('price').innerHTML="<b>$"+ total_amount +"</b>";
document.add_img_frm.amount.value = total_amount;

if(document.add_img_frm.amount.value != ""){
if(document.add_img_frm.amount.value <= 0){
alert("Please check width and height properly");
return false;
}
}



//------------------------------------------------------------------------------


}
width=document.add_img_frm.width.value;
height=document.add_img_frm.height.value;
x2=parseInt(document.add_img_frm.x1.value)+parseInt(width);
y2=parseInt(document.add_img_frm.y1.value)+parseInt(height);
document.add_img_frm.x2.value=x2;
document.add_img_frm.y2.value=y2;
}

function set_price()
{
if((document.add_img_frm.width.value!="")&&(document.add_img_frm.height.value!="")){
var flag = 1;
if(isNaN(document.add_img_frm.width.value)){
flag = 1;
}
if(isNaN(document.add_img_frm.height.value)){
flag = 0;
}

if(flag == 1){
//var total_block = document.getElementById('width').value*document.getElementById('height').value;
//var block_price = document.getElementById('block_price').value;


var total_block = document.add_img_frm.width.value*document.add_img_frm.height.value;
//var block_price = document.getElementById('block_price').value;

var block_price = document.add_img_frm.block_price.value;
var total_amount = total_block*block_price;
document.getElementById('price').innerHTML="<b>$"+ total_amount +"</b>";
//document.add_img_frm.price.value="<b>$"+ total_amount +"</b>";
//document.add_img_frm.pp.value=total_amount;

document.add_img_frm.amount.value = total_amount;
}else{
//document.getElementById('price').innerHTML="Not yet calculated";
}

}else{
//document.getElementById('price').innerHTML="Not yet calculated";
}
}


</script>

<form name="add_img_frm" method="post" action="order_confirm.php" enctype="multipart/form-data" >
<table align="center" width="70%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td height="20" bgcolor="#000077" align="center" class="white_text_heading">Add
Your Image Link</td>
</tr>
<tr>
<td >
<table width="100%" border="0" cellpadding="0" cellspacing="6" bgcolor="#DFDFDF" class="black_simple">
<tr>
<td height="10">&nbsp;</td>
<td height="10">&nbsp;</td>
</tr>
<tr>
<td width="54%" height="25" >&nbsp;Contact Name</td>
<td width="46%" height="25"><input name="name" type="text" id="name" class="black_simple"></td>
</tr>
<tr>
<td width="54%" height="25">&nbsp;Email address</td>
<td height="25"><input name="email" type="text" id="email" class="black_simple" ><!--input name="email" type="text" id="email" class="black_simple" onChange="if(!isValidEmail(this.value)) { chng_col(this); }else { back_col(this)};" --></td>
</tr>
<tr>
<td width="54%" height="25">&nbsp;x1 Position</td>
<td height="25"><?php echo $x1; ?></td>
</tr>
<tr>
<td width="54%" height="25">&nbsp;y1 Position</td>
<td height="25"><?php echo $y1; ?></td>
</tr>
<tr>
<td width="54%" height="25">&nbsp;Width</td>
<td height="25"><input name="width" type="text" id="width" class="black_simple" onChange="set_price();" onKeyUp="set_price();">
Block(s) </td>
</tr>
<tr>
<td width="54%" height="25">&nbsp;Height</td>
<td height="25"><input name="height" type="text" id="height" class="black_simple" onChange="set_price();" onKeyUp="set_price();">
Block(s)</td>
</tr>
<tr>
<td width="54%" height="25">&nbsp;Link to website</td>
<td height="25"><input name="url" type="text" id="url" class="black_simple"></td>
</tr>
<tr>
<td width="54%" height="25"> &nbsp;Message Box(50 Characters
max) </td>
<td height="25"><input name="title" type="text" id="title" maxlength="50" class="black_simple"></td>
</tr>
<tr>
<td width="54%" height="25">&nbsp;Pixel(s) Image</td>
<td height="25"><input name="upload_img" type="file" id="upload_img" class="black_simple"></td>
</tr>
<tr>
<td width="54%" height="25">&nbsp;Price :</td>
<td height="25"><input type="hidden" name="amount" id="amount"><div id=price></div></td>
</tr>
<tr>
<td width="54%" height="25">&nbsp;</td>
<td height="25"><input type="submit" name="paypal" value="Paypal" class="button" onClick="return chk_form()">
&nbsp;&nbsp;
<input type="reset" name="reset" value="Reset" class="button">

<input type="hidden" name="x1" id="x1" value="<?php echo $x1; ?>">
<input type="hidden" name="y1" id="y1" value="<?php echo $y1; ?>">
<input type="hidden" name="x2" id="x2" >
<input type="hidden" name="y2" id="y2" >
<input type="hidden" name="block_price" value="<?php echo $block_price; ?>">

</td>
</tr>
<tr>
<td height="10">&nbsp;</td>
<td height="10">&nbsp;</td>
</tr>
</table></td>
</tr>
</table></form>
<script language="JavaScript">
document.getElementById('price').innerHTML="Not yet calculated";
</script>
<?php
include("inner_footer.php");
include("footer.php");
?>

kokesoft escribió:

En el 2014 NADIE paga publicidad por píxeles.