Multiple 'If' statements - is there a better way to write this?

[patelxxx]

[CODE=javascript]var locationID=docu ment.getElement ById("locationI D");

if (locationID.val ue!="England")
if (locationID.val ue!="Wales")
if (locationID.val ue!="Ireland")
if (locationID.val ue!="Scotland")
{
alert("Please enter a location");
return false;
}
[/CODE]

Please use CODE tags - MODERATOR
Is there a better way to write this (see above code)? If you can start me start off that would be great.

cheers

[acoder]

Moved from Articles section.

Please post code using CODE tags.

[acoder]

Is there a better way to write this (see above code)? If you can start me start off that would be great.

If locationID is select object, then just check if the value is equal to the empty string.

[theS70RM]

yea what he said, i.e.:

var locationID=document.getElementById("locationID");

if (locationID.value == "") {
  alert("Please enter a location");
  return false;
}

or if u need to check they havn't entered some other spurious location then:

function checklocation(){

var locationID=document.getElementById("locationID");

var allowed_locations = new Array("England", "Wales", "Ireland", "Scotland");

  for (i=0; i<=allowed_locations.length; i++){
    if (locationID == allowed_locations[i])
      return true;
  }
alert("enter a location");
return false;
}

be sure to check case sensitivity if you have let them enter this rather than using a dropdown box.