if (document.images){
nav1_off = new Image();
nav1_on = new Image();
nav2_off = new Image();
nav2_on = new Image();
nav3_off = new Image();
nav3_on = new Image();
nav4_off = new Image();
nav4_on = new Image();
nav5_off = new Image();
nav5_on = new Image();
nav6_off = new Image();
nav6_on = new Image();

nav1_off.src = "images/nav1.gif";
nav1_on.src = "images/nav1_on.gif";
nav2_off.src = "images/nav2.gif";
nav2_on.src = "images/nav2_on.gif";
nav3_off.src = "images/nav3.gif";
nav3_on.src = "images/nav3_on.gif";
nav4_off.src = "images/nav4.gif";
nav4_on.src = "images/nav4_on.gif";
nav5_off.src = "images/nav5.gif";
nav5_on.src = "images/nav5_on.gif";
nav6_off.src = "images/nav6.gif";
nav6_on.src = "images/nav6_on.gif";

mp1 = new Image(); mp1.src = "media/skins/dcp/background.png";
mp2 = new Image(); mp2.src = "media/skins/dcp/b_next.png";
mp3 = new Image(); mp3.src = "media/skins/dcp/b_pause.png";
mp4 = new Image(); mp4.src = "media/skins/dcp/b_pl_down.png";
mp5 = new Image(); mp5.src = "media/skins/dcp/b_pl_up.png";
mp6 = new Image(); mp6.src = "media/skins/dcp/b_play.png";
mp7 = new Image(); mp7.src = "media/skins/dcp/b_playlist.png";
mp8 = new Image(); mp8.src = "media/skins/dcp/b_prev.png";
mp9 = new Image(); mp9.src = "media/skins/dcp/b_stop.png";
mp10 = new Image(); mp10.src = "media/skins/dcp/digits.png";
mp11 = new Image(); mp11.src = "media/skins/dcp/font.png";
mp12 = new Image(); mp12.src = "media/skins/dcp/transport_bg.png";
mp13 = new Image(); mp13.src = "media/skins/dcp/transport_handle.png";
mp14 = new Image(); mp14.src = "media/skins/dcp/transport_loaded.png";
mp15 = new Image(); mp15.src = "media/skins/dcp/volume_bg.png";
mp16 = new Image(); mp16.src = "media/skins/dcp/volume_handle.png";
mp17 = new Image(); mp17.src = "media/skins/dcp/volume_indicator.png";
}

function roll(sname,rname){
    sname.src = rname.src;
}


function signup_validate(f) {
	var AtSym = f.elements.email.value.indexOf('@')
	var dot = f.elements.email.value.lastIndexOf('.')
	var space = f.elements.email.value.indexOf(' ')
	var length = f.elements.email.value.length
	
	if (f.elements.firstname.value ==''){
	  alert('Please enter your first name.');
		return false;
	}else if (f.elements.lastname.value ==''){
	  alert('Please enter your last name.');
		return false;
	}else if (f.elements.title.value ==''){
	  alert('Please enter your title.');
		return false;
	}else if (f.elements.company.value ==''){
	  alert('Please enter your company.');
		return false;
	}else if ((AtSym < 1 ) ||   // '@' can't be first
    	 (dot <= AtSym +1 ) || //one char between '@' and '.'
	     (dot == length - 1 ) ||  //one char after '.'
	     (space  != -1))  //no spaces allowed
	   {  
	    alert("Please enter a valid e-mail address");
	    return false;
	   }else{
   f.elements.flow.value=1;
	 f.submit();
	}

}