// Show Hide Change style.
function shc(whichlayer, obj, new_style, old_style) {
	var style5=document.getElementById(whichlayer).style;
	if(style5.display=='block') {
		style5.display='none';
	    obj.className = new_style;
	}else {
		style5.display='block';
	    obj.className = old_style;
	}
		
}