function checkkeypress(e,counter)
{ var index=document.getElementById(counter).value; if (index>0)
{ document.getElementById(counter).value =index-1; return true;}
else
{ return false;}
}
function checkdelete(e,counter,content,maxlength)
{ var keynum; var index; index=document.getElementById(counter).value; if(window.event)
{ keynum = e.keyCode;}
else if(e.which)
{ keynum = e.which;}
var len; if (((keynum==8) &&(index<=maxlength)) || (keynum==46) && (index<=maxlength))
{ len=document.getElementById(content).value.length; document.getElementById(counter).value=maxlength-len;}
}