var intVal
function ZoomIn(id){
	
	 intVal = window.setInterval("increase('"+id+"')", 100);
}

function ZoomOut(id){
	
	 intVal = window.setInterval("decrease('"+id+"')", 100);
}

function increase(id){
	
	
	document.getElementById(id).width=document.getElementById(id).width+10;
	document.getElementById(id).height=document.getElementById(id).height+10;
	
}

function StopZoom() {
	window.clearInterval(intVal);
}

function decrease(id){


		document.getElementById(id).width=document.getElementById(id).width-10;
		document.getElementById(id).height=document.getElementById(id).height-10;
		//decrease();
}