function ShowLayer(whichlayer) {
        // show layer
        var whichlayer = document.getElementById(whichlayer);
		if (whichlayer.style.display != 'block') {
			whichlayer.style.top = tempY 
	        whichlayer.style.display = 'block';
	        // show IFRAME
	        var iframe = document.getElementById('iframe');
	        iframe.style.display = 'block';
	        iframe.style.width = whichlayer.offsetWidth - 10;
		    iframe.style.height = whichlayer.offsetHeight - 10;
    	    iframe.style.left = whichlayer.offsetLeft;
    	    iframe.style.top = tempY 
		}
    }
	
function ShowCaseLayer(whichlayer, title) {
        // show layer
		document.getElementById('case').style.display = 'block'
		document.getElementById('case_title').innerHTML = title
		//document.getElementById('case_content').innerHTML = text
    }
function HideLayer(whichlayer) {
        // hide IFRAME
        var iframe = document.getElementById('iframe');
        iframe.style.display = 'none';
        // hide layer
        var whichlayer = document.getElementById(whichlayer);
        whichlayer.style.display = 'none';
    }
	
var IE = document.all?true:false;
document.onmousemove = getMouseY;
var tempX = 0;
var tempY = 0;
function getMouseY(e) {
	if (!IE) {
		tempY = e.pageY;
	} else {
   		tempY = event.clientY + (document.documentElement.scrollTop ?
   document.documentElement.scrollTop :
   document.body.scrollTop);
	}
}