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14 pisoni 1 
<SCRIPT>
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// ---------------------------------------------------------------------- #
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// Copyright: (C) 2002 Leader.IT S.r.l. <http://leader.it>
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// Authors: Guido Brugnara <gdo@leader.it>
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//
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// $Revision: 18 $
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// ---------------------------------------------------------------------- #
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</SCRIPT>
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<PUBLIC:COMPONENT URN="www.leader.it/jscript/library/form/CLASS" >
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  <PUBLIC:PROPERTY NAME="Descrizione" />
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  <PUBLIC:PROPERTY NAME="Minlength" />
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  <PUBLIC:ATTACH EVENT="onkeypress" ONEVENT="IsDATESet()" />
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  <PUBLIC:ATTACH EVENT="onblur" ONEVENT="IsDATEFinal()" />
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  <PUBLIC:ATTACH EVENT="onfocus" ONEVENT="ViewDescription()" />
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  <PUBLIC:ATTACH EVENT="onmouseenter" ONEVENT="ViewDescription()" />
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  <PUBLIC:ATTACH EVENT="onmouseleave" ONEVENT="DeleteDescription()" />
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  <SCRIPT LANGUAGE="JScript">
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  // provvede ad un baco riscontrato in IE5.5 per cui parseInt('04') == 0
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  //
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  function my_parseInt(val){
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    var re = /^0+(\d+)/;
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    if(re.test(val)){
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      return parseInt(RegExp.$1);
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    }else{
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      return parseInt(val);
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    }
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  }
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  function ViewDescription(){
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    try {
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      if(Descrizione == ''){
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        window.status = "Campo "+id;
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      }else{
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        window.status = Descrizione;
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      }
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    }catch(e){
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      window.status = "Campo "+id;
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    };
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  }
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  function DeleteDescription(){
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    window.status = "";
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  }
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  function IsDATEFinal(){
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    DeleteDescription();
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    if(readOnly){
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      return;
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    }
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    if(Minlength && value.length  < Minlength && value.length != 0){
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      focus();
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      window.alert("Inserire almeno "+Minlength+" caratteri");
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      event.returnValue = false;
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      return false;
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    }
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    return;
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  }
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  // filtra i tasti durante immissione in campo DATA
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  function IsDATESet(){
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    with(event){
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      //window.alert("Key ="+keyCode);
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      //window.alert("offsetX="+offsetX+" Y="+offsetY);
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      // filtro i caratteri ammessi
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      if(keyCode>=48 && keyCode<=57){
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        // se e:numeri return ok
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        return true;
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      }
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      if(keyCode>=97 && keyCode<=122){
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        // se e:a..z return ok
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        return true;
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      }
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      if(keyCode>=65 && keyCode<=90){
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        // se e:A..Z return ok
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        // lowercase transforming
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        keyCode = 32 + keyCode;
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        return true;
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      }
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      if(keyCode==32){
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        // se e:space trasforma a:_
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        keyCode=95;
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        return true;
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      }
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      if(keyCode==95){
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        // se e:_ return ok
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        return true;
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      }
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      // se diverso da numero o a..z o A..Z o space o _ annullo il carattere digitato
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      keyCode=0;
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      return false;
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    }
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  }
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  </SCRIPT>
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</PUBLIC:COMPONENT>