Simple Machines Community Forum

Good day SMF peeps... I would like to put this code appearing in the posting area. It looks somehow the same as Imageshack MOD. I hope someone can help me how to put this code as I am just new to SMF pulling out myself from phpbb.  :D

(http://www.imgdump.net/)

<script><!--
var textcolor = "black";
var textsize = "12px";
var fontname = "verdana";
var bordercolor = "black";
var borderwidth = "1px";
var bgcolor = "EAEAEA";
var inputboxbgcolor = "white";
var inputboxtextcolor = "black";

document.write("<iframe style='width: 200px; height: 50px' align='center' marginwidth='0' marginheight='0' scrolling='no' frameborder='0' id='blank' name='upload' src='http://www.imgdump.net/upload.php?bg="+bgcolor+"&bgbox="+inputboxbgcolor+"&txtcolor="+textcolor+"&txtsize="+textsize+"&bdwidth="+borderwidth+"&bordercolor="+bordercolor+"&boxtxtcolor="+inputboxtextcolor+"&font="+fontname+"'>");
document.write("</iframe>");
-->
</script>