// JS by lixiaoyi
// the global functions

// Get All elements of the DOM that matches the class name
// cname: the class that the elements match
function lxy_getElementsByClassName(cname) { 
    var el = [],
        _el = document.getElementsByTagName('*');
    for (var i=0; i<_el.length; i++ ) {
       if (_el[i].className == cname ) {
           el[el.length] = _el[i];
        }
   }
   return el;
}

// Hide one row of a list of table
// table: destination table list
// rowIndex: index of destination row 
function lxy_hideRow(tableList, rowIndex)
{
	for (i = 0; i < tableList.length; i++) 
	{
     tableList[i].rows[rowIndex].style.display = "none";
    }    
}

// add the trim function to the String
// the function "trim" returns a copy of the string, 
//     with leading and trailing whitespace omitted  
String.prototype.trim = function()
{  
	return this.replace(/(^s*)|(s*$)/g, "");
}

// preLoad some pic to a image array named 'lxy_imageArray' which is set to
//    a attribute of documetn
function simplePreload()
{ 
	  var args = simplePreload.arguments;
	  document.lxy_imageArray = new Array(args.length);
	  for(var i=0; i<args.length; i++)
	  {
		document.lxy_imageArray[i] = new Image;
		document.lxy_imageArray[i].src = args[i];
	  }
}