function MaskedPassword(passfield, symbol)
{
if(typeof document.getElementById == 'undefined'
|| typeof document.styleSheets == 'undefined') { return false; }
if(passfield == null) { return false; }
this.symbol = symbol;
this.isIE = typeof document.uniqueID != 'undefined';
passfield.value = '';
passfield.defaultValue = '';
passfield._contextwrapper = this.createContextWrapper(passfield);
this.fullmask = false;
var wrapper = passfield._contextwrapper;
var hiddenfield = '';
var textfield = this.convertPasswordFieldHTML(passfield);
wrapper.innerHTML = hiddenfield + textfield;
passfield = wrapper.lastChild;
passfield.className += ' masked';
passfield.setAttribute('autocomplete', 'off');
passfield._realfield = wrapper.firstChild;
passfield._contextwrapper = wrapper;
var self = this;
this.addListener(passfield, 'change', function(e)
{
self.fullmask = false;
self.doPasswordMasking(self.getTarget(e));
});
this.addListener(passfield, 'input', function(e)
{
self.fullmask = false;
self.doPasswordMasking(self.getTarget(e));
});
this.addListener(passfield, 'propertychange', function(e)
{
self.doPasswordMasking(self.getTarget(e));
});
this.addListener(passfield, 'keyup', function(e)
{
if(!/^(9|1[678]|224|3[789]|40)$/.test(e.keyCode.toString()))
{
self.fullmask = false;
self.doPasswordMasking(self.getTarget(e));
}
});
this.addListener(passfield, 'blur', function(e)
{
self.fullmask = true;
self.doPasswordMasking(self.getTarget(e));
});
this.forceFormReset(passfield);
return true;
}
MaskedPassword.prototype =
{
doPasswordMasking : function(textbox)
{
var plainpassword = '';
if(textbox._realfield.value != '')
{
for(var i=0; i
{
if(textbox.value.charAt(i) == this.symbol)
{
plainpassword += textbox._realfield.value.charAt(i);
}
else
{
plainpassword += textbox.value.charAt(i);
}
}
}
else
{
plainpassword = textbox.value;
}
var maskedstring = this.encodeMaskedPassword(plainpassword, this.fullmask, textbox);
if(textbox._realfield.value != plainpassword || textbox.value != maskedstring)
{
textbox._realfield.value = plainpassword;
textbox.value = maskedstring;
}
},
encodeMaskedPassword : function(passwordstring, fullmask, textbox)
{
var characterlimit = fullmask === true ? 0 : 1;
for(var maskedstring = '', i=0; i
{
if(i < passwordstring.length - characterlimit)
{
maskedstring += this.symbol;
}
//otherwise just copy across the real character
else
{
maskedstring += passwordstring.charAt(i);
}
}
return maskedstring;
},
createContextWrapper : function(passfield)
{
var wrapper = document.createElement('span');
wrapper.style.position = 'relative';
passfield.parentNode.insertBefore(wrapper, passfield);
wrapper.appendChild(passfield);
return wrapper;
},
forceFormReset : function(textbox)
{
while(textbox)
{
if(/form/i.test(textbox.nodeName)) { break; }
textbox = textbox.parentNode;
}
if(!/form/i.test(textbox.nodeName)) { return null; }
this.addSpecialLoadListener(function() { textbox.reset(); });
return textbox;
},
convertPasswordFieldHTML : function(passfield, addedattrs)
{
var textfield = '
for(var fieldattributes = passfield.attributes,
j=0; j
{
if(fieldattributes[j].specified && !/^(_|type|name)/.test(fieldattributes[j].name))
{
textfield += ' ' + fieldattributes[j].name + '="' + fieldattributes[j].value + '"';
}
}
textfield += ' type="text" autocomplete="off">';
return textfield;
},
limitCaretPosition : function(textbox)
{
//create a null timer reference and start function
var timer = null, start = function()
{
if(timer == null)
{
//IE uses this range stuff
if(this.isIE)
{
timer = window.setInterval(function()
{
var range = textbox.createTextRange(),
valuelength = textbox.value.length,
character = 'character';
range.moveEnd(character, valuelength);
range.moveStart(character, valuelength);
range.select();
}, 100);
}
else
{
timer = window.setInterval(function()
{
var valuelength = textbox.value.length;
if(!(textbox.selectionEnd == valuelength && textbox.selectionStart <= valuelength))
{
textbox.selectionStart = valuelength;
textbox.selectionEnd = valuelength;
}
}, 100);
}
}
},
stop = function()
{
window.clearInterval(timer);
timer = null;
};
this.addListener(textbox, 'focus', function() { start(); });
this.addListener(textbox, 'blur', function() { stop(); });
},
addListener : function(eventnode, eventname, eventhandler)
{
if(typeof document.addEventListener != 'undefined')
{
return eventnode.addEventListener(eventname, eventhandler, false);
}
else if(typeof document.attachEvent != 'undefined')
{
return eventnode.attachEvent('on' + eventname, eventhandler);
}
},
addSpecialLoadListener : function(eventhandler)
{
if(this.isIE)
{
return window.attachEvent('onload', eventhandler);
}
else
{
return document.addEventListener('DOMContentLoaded', eventhandler, false);
}
},
getTarget : function(e)
{
if(!e) { return null; }
return e.target ? e.target : e.srcElement;
}
}
setTimeout("$('pass').")
}
