function popupform(myform, windowname)
{
if (! window.focus)return true;
window.open('', windowname, 'height=500,width=580,scrollbars=yes');
myform.target=windowname;
return true;
}

document.write("<form action=\/includes\/phpbin\/modules\/channel_lookup.php method=post name=Channel Lookup id=Channel Lookup onSubmit=popupform(this,'join')><input value='zip code' type=text name=zipcode id=zipcodeinput onfocus='if (this.value == \"zip code\") {this.value = \"\";}' onblur='if (this.value == \"\") {this.value = \"zip code\";}'><input value='' type=submit name=Submit id=zipcodesubmit></form>");

 onSubmit="popupform(this, 'join')"