function clearform(obj){
	if(obj.defaultValue == obj.value){
		obj.value = "";
	}
}

var objup = null;
var objdown = null;
var initup = null;
var initdown = null;
var upheight;
var upheight2;
var downheight;
var offsetheights = new Array();

function initShowHideDivs()
{
	var divs = document.getElementsByTagName('DIV');
	for(var no=0;no<divs.length;no++){
		if(divs[no].className.substr(0,15)=='submenu_active_'){
			offsetheights[no] = divs[no].offsetHeight;
			divs[no].style.display='none';
			divs[no].style.height='1px';
			divs[no].style.position='relative';
			divs[no].style.overflow='hidden';
		}		
	}	
}

function showmenu(id){
	upheight = 0;
	upheight2 = 0;
	
	var divs = document.getElementsByTagName('DIV');
	for(var no=0;no<divs.length;no++){
		
		if(divs[no].className=='submenu_active_'+id){
			objup = divs[no];
			upheight = (offsetheights[no]);
		}		
	}	
	objup.style.display = '';
	clearInterval(initup);
	initup = setInterval("slideUp()",1);
}

function slideUp(){
	if(objdown != null){
		if(downheight >= 0){
		objdown.style.height = downheight+"px";
		downheight -= 10;
		}else{
			objdown = null;
		}
	}else
	if(upheight2 <= upheight+10){
		objup.style.height=upheight2+'px';
		upheight2+=10;
	}else{
		downheight = parseInt(objup.style.height.substr(0,objup.style.height.length-2),10);
		objdown = objup;
		clearInterval(initup);
	}
	
}