function clear2(obj)
{
	if (obj) 
	obj.value= '';
}

function numKeyPressed2(obj, id, ocontrol)
{
	n= getValue(obj, id);
	if (ocontrol && (ocontrol.value.length < 4) ) ocontrol.value += n;
}

function getValue(obj, id)
{  
   return eval( obj + '.numpressed(' +id+ ');' )
}

function show()
{
	this.reorder();
	this.writenumpad();
}

function numpressed(j)
{
	return this.C[j];
}

function reorder()
{
	tmp= new Array(this.BC);
    for (i=0; i<this.BC; i++) tmp[i]=i
	
	this.C= Array(this.BC); 
		
	for (i=this.BC-1; i>=0; i--)
	{
		index = Math.floor(Math.random() * i);
		this.C[i]= tmp[index]
		if ( index != i )
			tmp[index]= tmp[i];	
	}
}

function writenumpadbut(j)
{
	but_id= this.numpad_bprefix+j;
	s= '\<td width="25">\<font class="botones">\<button id="'+but_id+'" OnClick="javascript:numKeyPressed(\''+this.name+'\','+j+')">'+ '&nbsp;&nbsp;' +this.C[j]+ '&nbsp;&nbsp;' +'\</a>\</font>\</td>'
	
	document.write(s)	
}

function writenumpadtr_in()
{
	document.write('\<tr height="20" align="center" >')
}

function writenumpadtr_out()
{
	document.write('\</tr>')                                           
}

function writenumpad()
{
	document.write('\<table  class="teclado" cellpadding="0" cellspacing="0">')
	
	for (i=0; i< this.BC; i++)
	{
		if (i%3==0) this.writenumpadtr_in()
		this.writenumpadbut(i)	
		if (i%3==2) this.writenumpadtr_out()
	}
	
	s = '\<td colspan="2">\<button class="botones" OnClick="javascript:cclear()">&nbsp;&nbsp;Limpiar&nbsp;&nbsp;\</a>\</td>';
	document.write(s)
	
	document.write('\</tr>\</table>')
}

function numpad(numpad_id)
{
	this.BC= 10;	
	
	this.reorder= reorder;
	this.show= show;
	this.numpressed= numpressed;
	
	this.writenumpad= writenumpad
	this.writenumpadbut= writenumpadbut
	this.writenumpadtr_in= writenumpadtr_in
	this.writenumpadtr_out= writenumpadtr_out
	
	if (numpad_id == '')
		alert('error: numpad_id empty')
	
	this.numpad_bprefix= numpad_id
	
	this.name= 'np_' + numpad_id
}
function formatAsMoney(mnt) 
{
    mnt -= 0;
    mnt = (Math.round(mnt*100))/100;
    return (mnt == Math.floor(mnt)) ? mnt + '.00' : ( (mnt*10 == Math.floor(mnt*10)) ? mnt + '0' : mnt);
}