var Popup = {
	open: function(options)
		{
    	this.options = 
			{
      		url: '#',
		    width: 800,
      		height: 600,
      		name:"_blank",
      		location:"no",
      		menubar:"no",
      		toolbar:"no",
      		status:"yes",
      		scrollbars:"yes",
      		resizable:"yes",
      		left:"",
      		top:"",
      		normal:false
    		}
    	Object.extend(this.options, options || {});

    	if (this.options.normal)
			{
        	this.options.menubar = "yes";
        	this.options.status = "yes";
        	this.options.toolbar = "yes";
        	this.options.location = "yes";
    		}

    	this.options.width = this.options.width < screen.availWidth?this.options.width:screen.availWidth;
    	this.options.height=this.options.height < screen.availHeight?this.options.height:screen.availHeight;
    	var openoptions = 
		'width='+this.options.width+',height='+this.options.height+',location='+this.options.location+',menubar='+this.options.menubar+',toolbar='+this.options.toolbar+',scrollbars='+this.options.scrollbars+',resizable='+this.options.resizable+',status='+this.options.status
    	if (this.options.top!="")
			{ openoptions+=",top="+this.options.top; }
    	if (this.options.left!="")
			{ openoptions+=",left="+this.options.left; }
    	window.open(this.options.url, this.options.name,openoptions );
    	return false;
  		}
	}




function IsNumeric(strString)
   //  check for valid numeric strings  
   {
   var strValidChars = "0123456789.-";
   var strChar;
   var blnResult = true;

   if (strString.length == 0) return false;

   //  test strString consists of valid characters listed above
   for (i = 0; i < strString.length && blnResult == true; i++)
      {
      strChar = strString.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
         {
         blnResult = false;
         }
      }
   return blnResult;
   }