var movement

function rollDownMenu(obj, final_y, Speed) {
	
	
	
		clearTimeout(movement)

		if(!document.getElementsByTagName) return false;
		if(!document.getElementById) return false;
		
		
		if(obj == "mainNav") {

			document.getElementById("modulesIndicator").src = "images/modules_on.jpg"
			document.getElementById("modulesHeaderFooter").src = "images/modules_header_footerBlue.jpg"
		}
		
		
		var current_y = parseInt(document.getElementById(obj).style.height)
		var interval = 1
		var distance
		//alert(Speed)
		//alert(obj)
		//alert(current_y)


		
		if(current_y < final_y) {
			
			
			//if((final_y - current_y) < (final_y - 50)){
			
			//	distance = Math.ceil((final_y - current_y)/Speed)
				
			//}
			
			//else {
				
				distance = Math.ceil((final_y - current_y)/Speed)

			//}
							
			current_y = (current_y + distance)
			
			
			document.getElementById(obj).style.height = current_y + "px"
			
			current_y = parseInt(document.getElementById(obj).style.height)
			
			repeat = "rollDownMenu('" + obj + "'," + final_y + "," + Speed + "," + Speed + ")"
			
			movement = setTimeout(repeat, interval)
		}
		
		
		
	
}



function rollUpMenu(obj, final_y) {
	
		clearTimeout(movement)
		
		if(!document.getElementsByTagName) return false;
		if(!document.getElementById) return false;
		
		var current_y = parseInt(document.getElementById(obj).style.height)
		var interval = 1
		var distance
		
		//alert(obj)

		//document.getElementById("mainText").style.backgroundColor = "#FFFFFF"

		if(current_y > final_y) {
			
			
			if(current_y < 50){
				
				distance = Math.ceil((current_y - final_y)/5)
	
			}
			
			else {
				
				distance = Math.ceil((current_y - final_y)/5)
				
			}
			
			current_y = (current_y - distance)
			
			document.getElementById(obj).style.height = current_y + "px"
			
			current_y = parseInt(document.getElementById(obj).style.height)
			
			repeat = "rollUpMenu('" + obj + "'," + final_y + ")"
			
			movement = setTimeout(repeat, interval)
		}
		
		
		if(obj == "mainNav") {
			
			if(current_y == final_y) {

					document.getElementById("modulesIndicator").src = "images/modules_off.jpg"
			document.getElementById("modulesHeaderFooter").src = "images/modules_header_footerWhite.jpg"

			}
			
		}
			
		
	
}