function displayElement( ElementId )
{		
      var obj = document.getElementById(ElementId);
			return obj.style.display = ( obj.style.display == 'block' ) ? 'none' : 'block';
}


function randomString( strLen ) 
{
		RandStr = "";
		
		for (i = 0; i < strLen; i++) 
		{
				 RandSign = String.fromCharCode(Math.round(Math.random()*(122-48))+48);
				 if (RandSign.match(/[0-9a-zA-Z]/)) RandStr += RandSign;
				 else i--;
		}
		
		return RandStr;
}