function ltrim(argvalue) {
  while (1) {
    if (argvalue.substring(0, 1) != " ")
      break;
    argvalue = argvalue.substring(1, argvalue.length);
  }
  return argvalue;
}

function rtrim(argvalue) {
  while (1) {
    if (argvalue.substring(argvalue.length - 1, argvalue.length) != " ")
      break;
    argvalue = argvalue.substring(0, argvalue.length - 1);
  }
  return argvalue;
}

function trim(argvalue) {
  var tmpstr = ltrim(argvalue);
  return rtrim(tmpstr);
}
function disableEnterKey() 
{ 
	if (window.event.keyCode == 13) window.event.keyCode = 0; 
} 

function replace(string,text,by) {
// Replaces text with by in string
    var strLength = string.length, txtLength = text.length;
    if ((strLength == 0) || (txtLength == 0)) return string;

    var i = string.indexOf(text);
    if ((!i) && (text != string.substring(0,txtLength))) return string;
    if (i == -1) return string;

    var newstr = string.substring(0,i) + by;

    if (i+txtLength < strLength)
        newstr += replace(string.substring(i+txtLength,strLength),text,by);

    return newstr;
}


var opened=false;
var win;
function openPopup(str,nm,width,height){
	if(opened == false){
		win = open(str,nm,"status=0,scrollbars=1,menubar=0,toolbar=0,location=0,resizeable=1,width="+width+",height="+height);
	}
	else if(opened == true){
		if(win.closed == false)
		win.close(); 
		win = window.open(str,nm,"status=0,scrollbars=1,menubar=0,toolbar=0,location=0,resizeable=0,width="+width+",height="+height);    
	}
	opened = true; 
}

function openPopupWithoutToolbar(str,nm,width,height){
	if(opened == false){
		win = open(str,nm,"status=0,scrollbars=0,menubar=0,toolbar=0,location=0,resizeable=0,width="+width+",height="+height);
	}
	else if(opened == true){
		if(win.closed == false)
		win.close(); 
		win = window.open(str,nm,"status=0,scrollbars=0,menubar=0,toolbar=0,location=0,resizeable=0,width="+width+",height="+height);    
	}
	opened = true; 
}