function AlphaImage(who,state) {
	if(state=="on"){
		who.style.filter = 'alpha(opacity=50)';	
		who.style.opacity = 0.5;
	}
	else{
		who.style.filter = 'alpha(opacity=100)';
		who.style.opacity = 1;	
	}
}



//function for dynamically switching the background image
var ns = (document.all)?false:true;
var intBack = 0;
function changeBg(divId,intBack) {
if (ns){
layerObject = document.getElementById(divId).style;
} else {
layerObject = eval(divId + ".style");
}
layerObject.backgroundImage = 'url(_gfx/bg_index_pic_main'+intBack+'.jpg)';
}