Schovavanie poli

 <script> 
function checkForOther(obj) { 
 if (!document.layers) { 
 var txt = document.getElementById("preukazanie"); 
 if (obj.value == "suhlas") { 
 txt.style.display = "inline"; 
 // gives the text field the name of the drop-down, for easy processing 
 txt.name = "sidlo"; 
 obj.name = ""; 
 } else { 
 txt.style.display = "none"; 
 txt.name = ""; 
 obj.name = "sidlo"; 
 } 
 } 
} 
</script> 

<form name="formular" method="POST" action="nextPage.htm"> 
<select name="sidlo" id="titles" onchange="checkForOther(this)"> 
<option value="suhlas">súhlas vlastníka so sídlom</option>
 <option value="najomna">nájomná zmluva</option>  
</select> 
</form> 
    
    <span id="cislo_listu">Číslo listu vlastníctva</span>
    <input type="text" id="preukazanie" size="21">
        
    <span id="meno_vlastnika_text">Meno vlastníka</span>
    <input type="text" id="vlastnik" size="20">