function replaceContent()
{
    var randomnumber=Math.floor(Math.random()*50)
    document.getElementById("cap").innerHTML = "<img src='jcaptcha/"+randomnumber+".jpg'/>";
}

function imposeMaxLength(Object, MaxLen)
{
    return (Object.value.length <= MaxLen);
}

function ShowPicture(id,Source,size) 
{
	for(i=0;i<size;i++)
	{
		if(document.layers)
               document.layers['Style'+i+''].visibility = "hide"
	      else if (document.all)
               document.all['Style'+i+''].style.visibility = "hidden"
             else if (document.getElementById)
              { 
               // alert(document.getElementById('Style'+i+''));
		  document.getElementById('Style'+i+'').style.visibility = "hidden"
              }
	}
	if (document.layers)
         document.layers[''+id+''].visibility = "show"
	else if (document.all) 
	  document.all[''+id+''].style.visibility = "visible"
	else if (document.getElementById)
	  document.getElementById(''+id+'').style.visibility = "visible"
}