extern function convert(val,sys) { 
var x = Lang.parseInt(val); 
var y;
if (sys == "feet") {
y = x/0.304;
}
else if (sys == "inches"){
y = x/0.0254;
}
WMLBrowser.setVar("res", String.toString(y)); 
WMLBrowser.go("foot.wml#display"); 
}