function isBlank(x){var blank=true;for(i=0;i<x.length;i++){if(x.charAt(i)!=' '){blank=false;}}
return blank;}
function isEmpty(x){if(x==""||isBlank(x)){return true;}
else{return false;}}
function unchanged(x){if(x.selectedIndex==0){return true;}
else{return false;}}