function isNumberKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
         if (charCode > 31 && (charCode < 48 || charCode > 57))
            return false;

         return true;
      }



function checkAllFields() {
	var chkAll = document.getElementById('checkAll');
	var checks = document.getElementsByName('bookcase_content[]');
	var boxLength = checks.length;
	var allChecked = false;
	
		if ( chkAll.checked == true )
		{
			for ( i=0; i < boxLength; i++ )
			checks[i].checked = true;
		}
		else
		{
			for ( i=0; i < boxLength; i++ )
			checks[i].checked = false;
		}
	
}


	function showHideShare(mainContainerId,titleContainerId) {
		document.getElementById(mainContainerId).style.display = "none";
		linkshareObj = document.getElementById(titleContainerId);
		linkshareObj.innerHTML = "Share";
	}
	function shareThis(titleContainerId, mainContainerId,framePara, frameId, shareFileURL) {
		shareObjId = document.getElementById(mainContainerId);
		linkshareObj = document.getElementById(titleContainerId);
		if (shareObjId.style.display == "block") {
			linkshareObj.innerHTML = "Share";
			shareObjId.style.display = 'none';
		} else {
			frameSourceVar = shareFileURL + '/popup/shareThis.html?'+ framePara;
			linkshareObj.innerHTML = "Close Share";
			shareObjId.innerHTML = '<iframe class="shareIframe" id="' + frameId + '" src="" frameborder="0" scrolling="no" marginheight="8" marginwidth="8"></iframe>';
			shareObjId.style.display = 'block';
			document.getElementById(frameId).src = frameSourceVar ;
			//document.frames[frameId].location.href = frameSourceVar;
		}
	}

	function linkBox() {

		var box = document.getElementById('linkBox').style;

		if (box.display != 'block') {
			box.display = 'block';
		} else {
			box.display = 'none';
		}

		return true;


	}