var g_divEffect = false;

function SetAlphaPanel(value){


		if(!g_divEffect){

			g_divEffect = document.createElement("DIV");
			document.body.appendChild(g_divEffect);

			g_divEffect.style.position			= 'absolute';
			g_divEffect.style.visibility		= 'hidden';
			g_divEffect.style.left				= '0px';
			g_divEffect.style.top				= '0px';
			g_divEffect.style.backgroundColor	= 'black';
			g_divEffect.style.zIndex			= 80;

		}

		if(value==0){
			g_divEffect.style.visibility = 'hidden';
		}else{

			g_divEffect.style.width				= document.body.scrollWidth		+ 'px';
			g_divEffect.style.height			= document.body.scrollHeight	+ 'px';

			g_divEffect.style.visibility	= 'visible';
			SetAlpha(g_divEffect, value);
		}
}

function SetAlpha(obj,value){

		obj.style.filter		= 'filter: alpha(opacity=' + value + ')';
		obj.style.MozOpacity	= value/100; 

}